Searching for "How much wood could a woodchuck chuck if a woodchuck could chuck wood" produces a vocal response of another tongue twister "A woodchuck would chuck as much wood as a woodchuck could chuck if a woodchuck could chuck wood"
Searching for "Christmas" returns a blue, Christmas background.
Searching for "Kwanzaa" returns a green, Kwanzaa background.
Searching for "Festivus" places a Festivus pole in the left side of the window.
Searching for "Santa Claus" or "Christmas decorations" places an animation of a snowy landscape with Santa Claus and his reindeer riding across the top of the search results. On Christmas Eve, a map will appear where Santa is currently located.
Searching for "anagram" results in the search engine asking "Did you mean: nag a ram" ("nag a ram" is an anagram of the word "anagram")
The Calculator recognizes a number of strings as numbers. They can be entered by themselves or used in expressions. They must be entered without quotation marks. When used in an expression, the phrases must be entered in lowercase. In addition to mathematical and scientific constants like pi, e and Avogadro's number the Calculator also accepts:
"the answer to the ultimate question of life, the universe, and everything" equals 42 as does "the answer to life, the universe, and everything", a reference to Douglas Adams's novel The Hitchhiker's Guide to the Galaxy. The same reference is made when speaking to an artificial intelligence named Meliza next to "the face on Mars" in Google Earth. When the number 42 is typed, the AI produces the output "42 is the answer to the ultimate question about life, the universe, and everything."
In early test versions of Google Maps, searching for a route between locations separated by expanses of water (e.g. Paris and New York) provided road directions to the coast of the destination country (in this case, the west coast of France) before suggesting "Swim the Atlantic Ocean (3,500 miles)" or another ocean for a different distance.
If the user asks for walking directions from China to Japan at Step 298 (or 31 by car) it will state "Jet ski across the Pacific Ocean"
The measurement tool in Google Earth allows users to measure distance in smoots, a unit of length derived from a tradition at MIT. Smoots are also recognized by Google calculator: 1 smoot in m gives the result 1 smoot = 1.7018 meters.
Going on Google Street View, and heading to the rear of the company's Googleplex headquarters in Mountain View, California, the Google Street View's production team can be seen. Similarly, by looking up Google's office in Wrocław, Poland on Street View, one can see Google employees from that office and similarly for Dublin, Ireland.
When the Business Photos feature was introduced (utilising the Street View API) Google's Lenoir, North Carolina datacentre published a full walkthrough. When navigating around the datacentre and its offices the viewer can see various employees dressed in costume, acting peculiarly, pulling faces and many other visual gags and easter eggs.
Google Earth's search example is the Google headquarters (37 25' 19.1" N, 122 05' 06" W).
Dragging the Google Street View "Peg man" onto Telegraph Avenue in Berkeley, CA used to display him with a tie-dyed shirt. Also, while in street view on Telegraph Avenue, one can enter and have a look around some of the shops. He is also given special clothing for some widely observed special occasions: for Halloween he rides a broomstick; for Valentine's Day he stands upon a heart; and during Christmas week, he becomes a snowman. When dragged into LegoLand in Carlsbad, the "Peg Man" turns into a LEGO man. When dragged into Street View in Sun Valley, Idaho, he becomes a skier. When dragged onto the vicinity of the Arthur Ashe Stadium, Flushing Meadows–Corona Park, "Peg Man" becomes a tennis player holding a racket. Dragged near the Kennedy Space Center, "Peg Man" becomes an astronaut.
The Mars Feature of Google Earth used to allow users to speak to a primitive ELIZA clone on the planet, by searching for "Meliza", but it later vanished, either taken away or it has disappeared. It is back as of October 28, 2013.
There is a place on the southern point of Half Moon Island, Antarctica that has blue "roads". When the man is dragged on this spot, the man turns into a penguin and users can explore the area the same as a road.
Searching for "Niniane kicks ass" in Google Maps used to direct to the tech firm's headquarters in Mountain View, California, where an engineering manager called Niniane Wang worked until 2009.
In Google Maps, when "The Shire" or "Rivendell" is entered as the start point and "Mordor" as the destination and the walking directions button is clicked, the directions return the warning: "Use caution – One does not simply walk into Mordor." 
On July 20, 2005, the 36th anniversary of the first human landing on the moon, Google debuted a version of Google Maps that included a small segment of the surface of the moon. It is based entirely on NASA images and includes only a very limited region. Panning causes the map to tile. The map also gives the locations of all moon landings, and the Google Moon FAQ humorously mentions a connection to the Google Copernicus hoax, which Google claimed to be developing. Supposedly, by 2069, Google Local will support all lunar businesses and addresses. Zooming to the closest level in Google Moon used to show that the moon was made of cheese.
If the co-ordinates 63° 2' N, 29° 55' W are input into Google Maps, it would return a photo of the city of Rapture from BioShock. The image was later deleted, and it only read "The City of Rapture". However, this was also later removed.
If the co-ordinates for Point Nemo are inputed into Google Maps, a shadowed imprint shows up with a compass and the word "NEMO" in the ocean.
Searching "Police Telephone Box" will lead the user to a Police Telephone Box in Earl's Court, London. Entering Street View will show the interior of the TARDIS from Doctor Who.
In December 2009, Google added an easter egg on their homepage whereby clicking the "I'm Feeling Lucky" box with no text entered brings up a clock counting down the seconds until 2010. When it reached zero it displayed "Happy New Year" in fireworks.
In December 2009 when typing in a search term including the word "Christmas" the line separating the sponsored links from the normal search is replaced with Christmas lights. Also, when typing in a search term including the word "Hanukkah" the line separating the sponsored links is replaced with a Dreidel design.
From May 21–23, 2010, Google replaced its usual homepage with a playable Google-style Pac-Man game to celebrate its 30th anniversary. The easter egg here was that by pressing Insert Coin (which replaced the "I'm Feeling Lucky" button) a second time, users could play a 2-player version of Pac-Man, starring both Pac-Man and Ms. Pac-Man (moving in WASD) in the same game. This was a first in the history of Pac-Man by the creators of Google Pac-Man at the 2011 Google I/O conference. Google's game is still playable
On November 30, 2012 when clicking the "I'm Feeling Lucky" button with no text, it changed into an "I'm Feeling Stellar" button. When the Stellar button was pressed it brought the user to a Google Earth, Hubble Telescope image of light moving outwards from a stellar outburst. On December 19, 2012, hovering the mouse over the "I'm Feeling Lucky" button made it spin to a random selection that included not just "I'm Feeling Stellar" but also "I'm Feeling Hungry" (bringing up a search for restaurants), "I'm Feeling Artistic" (googleartproject.com), "I'm Feeling Puzzled" (agoogleaday.com), "I'm Feeling Wonderful" (World Wonders Project), "I'm Feeling Playful" (Google Doodles), and "I'm Feeling Trendy" (Google Trends).
Selecting the "I'm Feeling Lucky" without typing anything in, it will display past Google logos.
Searching "google in 1998" will bring up a search result for "google" as it was in 1998, complete with their original UI and logo, as well as a "Take me back to 2013" button. Clicking some of the results on that page took the user to that result in 1998 using the Internet ArchiveWayback Machine.
On the Suggest a feature page for Gmail, it shows "Have Gmail do the laundry" as a suggestion.
Above the list of emails in Gmail, there is normally an ad, except in the spam folder, where there is instead a link to a recipe containing SPAM®. Also, if one visits trash, they get tips for recycling.
The English translate button uses a different font than the other buttons.
Go to translate.google.com and set 'translate from' to English. By writing certain sets of characters (ie. pz, bschk, fz) the translator will be changed to a "beatbox" mode. The tooltip which shows when the cursor is held over the speaker icon, will now show "beatbox" rather than "listen". Various combinations of consonants typed into the translator will result in a beatbox output rather than the usual speech narrator output. Note that there are other languages besides English which may be chosen for the beatbox mode to be operable. For example, Albanian, Armenian, German and Belarusian will work, but not Azerbajaini, Basque or English.
If you set the words to be translated from to German, and set the translation to English, it used to say "Google is NOT stupid" when you typed "google ist dumm".
Since the Gingerbread (2.3) version of Google's Android operating system an easter egg containing a funny animation has been hidden. The easter egg can be accessed through the Settings application, in the About phone section, by repeatedly tapping the Android version section. The animation is different in every version of the OS.
In 2.3 (Gingerbread) an image of an Android Robot in a crowd of zombies is displayed. The image is entitled Zombie Art by Jack Larson.
In 3.x (Honeycomb) an image of an Android Bee is displayed.
In 4.0 (Ice Cream Sandwich) Google has made a parody of Nyan Cat. Instead of a cat 8-bit versions of Android Robots enveloped in an ice cream sandwich biscuit fly over the screen.
In 4.1 (Jelly Bean) A bunch of jelly beans are spread over the screen. The user can then fling the jelly beans around. Doing the same thing in 4.2 unlocks the jelly bean flinger as a Daydream.
In 4.2 (Jelly Bean) When enabling Developer Tools by tapping the Build Number five times in the About screen, a note will appear at the bottom of the screen telling the user how many taps of the Build Number that are left before he/she becomes a developer. Once tapping it five times, the note congratulates the user saying that "You are now a developer!". Tapping it again afterwards results in the text "No need, you are already a developer" appears.
In 4.3 (Jelly Bean) An image of a red jelly bean appears. Tapping the screen causes a smiling face to appear on the bean while white text below reads : "Android 4.3" (and below that) "JELLY BEAN". Repeatedly tapping the Jellybean will bring up a bunch of jellybeans, and possibly a candy cane, spread out across the screen, which the user can then fling around. This appears each time the user turns on the device from standby until the user exits.
In 4.4 (KitKat) A Rotating letter "K" appears, which if continually tapped turns into the text "Android" in the styling of a KitKat® logo. If the Android logo is then pressed a tile interface loads with icons from all previous versions of android.
In Google+, if the device is shaken, snow will fall; if the device is shaken again it will save an animated GIF of the image with falling snow to the pictures directory.
Searching for “let's go caroling” or “let's go carolling” on Google Now will result in an extra card which displays a list of Christmas carols. Select one and your phone will play the music and show the words.
On the Google Play Games app, if the player swipes the Konami Code, a box will appear with a B button, and A button, and a ► button. Pressing B, A and then the ► in that order unlocks a secret achievement called "All your games are belong to us." A reference to the well known "All your base are belong to us" phrase.
Holding down the left and up arrow while pausing or watching a video caused a game of Snake to launch. This could also be done by pressing the right arrow instead of the left one. This was actually a result of two steps; pressing the up arrow while a video is loading launches the game, while pressing the left arrow forces the video to rewind and load momentarily, thus allowing the game to launch. Since the 2013 update, this no longer works, and now only works by pressing down while buffering instead.
During the course of the 2010 FIFA World Cup, YouTube had a button shaped like a football in certain videos that plays a recurring vuvuzela sound throughout the video.
During December 2011, a button was added which, when clicked, caused animated snow to fall from the top of the video.
A 500 Internal server error will cause this message to appear: "Sorry, something went wrong. A team of highly trained monkeys has been dispatched to deal with this situation. Please report this incident to customer service. Also, please include the following information in your report:" followed by an error report encoded in Base64.
Adding "&wadsworth=1" to a video URL will apply Wadsworth's constant, skipping the first 30% of the video.
If a user attempts to click their own "Subscribe" button, a mouseover will appear stating "No need to subscribe to yourself!". This feature no longer functions
On June 17, 2011, the scroll bar for the Nyan Cat video was replaced by Nyan cat.
As of December 2012, the view count on Gangnam Style features a sprite version of Psy dancing to commemorate reaching 1 billion views.
Putting in the search box "do the harlem shake" will cause the page to do the Harlem Shake. It can be muted and paused.
On April 15, 2013, in ocasion of the VHS 57th anniversary, YouTube added a tape mode button in the video player. When pushed the button, the video will take a degraded videotape look. Tape mode is still available, adding "&vhs=1" at the end of the video URL.
At the beginning of the robots.txt file, "robots.txt file for YouTube Created in the distant future (the year 2000) after the robotic uprising of the mid 90's which wiped out all humans." is commented out. This might be a reference to the Flight of the Conchords song Robots (also known as "Humans are Dead").
In occasion of the first YouTube Geek Week, putting in a search query that starts with "/ geekweek" will change the layout of the search page, reminesent of a Unix terminal.
In occasion of the first YouTube Geek Week, searching for "use the force, luke" will put a wavy effect on the results, which periodically fly around the screen.
In occasion of the first YouTube Geek Week, searching for "beam me up, scotty" will echo the classic Star Trek effect by ‘beaming’ the videos onto the results page.
In occasion of the first YouTube Geek Week, typing "1337" while viewing a video page will cause the comments to appear in leet.
In occasion of the first YouTube Geek Week, a small ‘pow’ button was added on selected Geek Week videos. When pushed it made the videos appear as if in a hand drawn comic book.
In occasion of the first YouTube Geek Week, typing "1980" while viewing a video page will start a game of Missile Command. The game ends after the video is finished playing
In occasion of the first YouTube Geek Week, searching for "ponies" or "bronies" will make My Little Pony: Friendship Is Magic ponies appear on the screen. Also, searching the names of many characters from the show will cause the top bar to become the same color as the character (e.g. "Rainbow Dash").
As of November 2013, searching for "doge meme" on YouTube, changes the font on the search result page to pastel color Comic Sans.
If a user right clicks on a YouTube video it gives one of the options in the Context menu is "stats for nerds"
If you click to the side of a video and type in "1980" and press enter, a game of missle command will begin. If too many meteoroids hit the bottom, the video will "break" and stop playing.
Typing in the Nyan Cat emoticon (~=[,,_,,]:3) on Google+ chat makes the text turn into an animated Nyan Cat.
Pressing control-shift-y in Picasa will cause a teddybear to appear on the screen.
If one sets the iGoogle theme to the "Beach" option, then at 3:14 am every morning, the Loch Ness Monster surfaces for 1-minute, then at 3:15 dives back under. The reason for the timing of 3:14 is rumoured to be a tribute to the number pi. Additional 3:14 eggs include the "Seasonal Scape" showing off the Northern Lights, the "City Scape" with UFOs, the "Spring Scape" with a monster, the "Sweet Dreams" with the stars aligning to the shape of the symbol pi, and the "Tea House" that has spirits in the mist.
In Chrome, Google's Web browser, entering "about:internets" into the address bar brings up a copy of the Windows Screen Saver 3D Pipes, with the title "Don't Clog the Tubes". In the event that this does not occur due to the fact that the screensaver file does not exist in the system, the browser will instead display a gray screen with the title "The Tubes are Clogged!" This has been removed as of the 188.8.131.52 release.
The Google Gears Firefox add-on description line reads "These are the gears that power the tubes! :-)". Google Chrome's gears.dll's description also reads "These are the gears that power the tubes! :-)".
In Google Chrome's Incognito browser, when you open a new tab it will come up with a message that says:
Be wary of: Surveillance by secret agents People standing behind you
In Google's iPhone and iPod touch search application, swiping downwards (past About) repeatedly in the Settings interface brings up a hidden menu item, called Bells and Whistles, allowing customization of colors, sounds and more within the app. This is now standard on the newest update.
In Google Voice, once a text-message being typed exceeds 320 characters ( 2 x 160-per-SMS), the countdown changes to "Really?"
In Google Docs, within a spreadsheet, pressing Shift+F12 brings up a message: "Dragon slain! Congratulations, you've slain the dragon!".
Going to "heart" gives a Java applet with an interactive jumping heart under the Google logo of the search page. The applet was made in 2000 by Ken Perlin.
In Google I/O 2013 page, can click letter I or O to input password, for example, when input OIIIIIII then press enter will enter a page with ASCII code.
In Google Glass, tap Settings -> Device info -> View licenses, then tap Google Glass's touchpad 9 times, will show Tap Meet Team option, then tap last time, will show Google Glass's develop team's photo.
On Google Play, if the user presses the search icon without entering text into the box, "Unicorns" will be automatically searched.
On Gmail, if the backround is set to "Ninja" press SHIFT+CRTL+F1 and the ninja will send an automatic email saying 'Hello' to everyone in the user's contacts.
Any photograph with Christmas lights uploaded to Google+ will be turned into an animated GIF, showing sparkling lights.
April Fools' hoaxes
Google's first April Fools' Day hoax, the MentalPlex hoax, invited users to project a mental image of what they wanted to find whilst staring at an animated gif. Several humorous error messages were then displayed on the search results page, all listed below:
Error 001: Weak or no signal detected. Upgrade transmitter and retry.
Error 666: Multiple transmitters detected. Silence voices in your head and try again.
Error 01: Brainwaves received in analog. Please re-think in digital.
Error 8P: Unclear on whether your search is about money or monkeys. Please try again.
Error 005: Searching on this topic is prohibited under international law.
Error CKR8: That information is protected under the National Security Act.
Error 144: That information was lost with the Martian Lander. Please try again.
Error 006: Query is unclear. Try again after removing hat, glasses and shoes.
Error 008: Interference detected. Remove aluminum foil and remote control devices.
Error: Insufficient conviction. Please clap hands 3 times, while chanting "I believe" and try again.
Error: MentalPlex(tm) has determined that this is not your final answer. Please try again.
Google reveals the technology behind its PageRank Systems—PigeonRank. Google touts the benefits of this cost-effective and efficient means of ranking pages and reassures readers that there is no animal cruelty involved in the process. The article makes many humorous references and puns based on computer terminology and how Google PageRank really works, (for example, a chart showing the pigeons' consumption of linseed and flax, represented as "Lin/Ax Kernels," a pun on the Linux kernel).
This hoax was probably intended as a parody of Google's then invite-only email service called Gmail. Although ostensibly free, the company claimed the beverage could only be obtained by returning the cap of a Google Gulp bottle to a local grocery store: a causal loop. In the Google Gulp FAQ, Google replies to the observation "I mean, isn't this whole invite-only thing kind of bogus?" by saying "Dude, it's like you've never even heard of viral marketing."
At about 10:00 pm, Pacific time (where Google has its headquarters) on March 30, 2007, Google changed the login page for Gmail to announce a new service called Gmail Paper. The service offered to allow users of Google's free webmail service to add e-mails to a "Paper Archive", which Google would print (on "96% post-consumer organic soybean sputum") and mail via traditional post. The service would be free, supported by bold, red advertisements printed on the back of the printed messages. Image attachments would also be printed on high-quality glossy paper, though MP3 and WAV files would not be printed. The page detailing more information about the service features photographs of Ian Spiro and Carrie Kemper, current employees of Google. Also featured are Product Marketing Managers of Gmail Anna-Christina Douglas, and Shane Lawrence.
Google TiSP (short for Toilet Internet Service Provider) was a fictitious free broadband service supposedly released by Google. This service would make use of a standard toilet and sewage lines to provide free Internet connectivity at a speed of 8 Mbit/s (2 Mbit/s upload) (or up to 32 Mbit/s with a paid plan). The user would drop a weighted end of a long, Google-supplied fiber-optic cable in their toilet and flush it. Around 60 minutes later, the end would be recovered and connected to the Internet by a "Plumbing Hardware Dispatcher (PHD)". The user would then connect their end to a Google-supplied wireless router and run the Google-supplied installation media on a Windows XP or Windows Vista computer ("Mac and Linux support coming soon"). Alternatively, a user could request a professional installation, in which Google would deploy nanobots through the plumbing to complete the process. The free service would be supported by "discreet DNA sequencing" of "personal bodily output" to display online ads that relate to culinary preferences and personal health. Google also referenced the diet coke-and-Mentos reaction in their FAQ: "If you're still experiencing problems, drop eight mints into the bowl and add a two-liter bottle of diet soda."
The Blogger dashboard featured an announcement for Google Weblogs, or "GWeblogs," or "Gblogs," the next revolution in personal publishing. Features include algorithms putting the user's best content at the top of the user's blog (rather than publishing by reverse chronology), automatically populating the blog's sidebar with the most relevant content, posting directly into Google search results for maximum visibility, blog headers refreshed with images from Google's team of artists for anniversaries of a scientific achievement (similar to Google Doodle), and automatic content generation ('Unsure of what to post about? Just click "I'm Feeling Lucky" and we'll "take care" of the rest!')
Gmail's sign-in page and a banner at the top of each Gmail inbox announced a new feature, called Gmail Custom Time, that would allow its users to "pre-date" their messages and choose to have the message appear as "read" or "unread". The new feature uses the slogan "Be on time. Every time."
Around 11:00 pm EST March 31, 2008, on the newer and older version of Gmail, but not in the basic HTML version, in the upper right corner, next to Settings, a link appeared labeled, "New! Gmail Custom Time". The link led to a 404 error until April 1, when it led to the full Gmail Custom Time hoax page. Clicking any of the three links at the bottom of the page brought the user to a page stating that Gmail Custom time was, in fact, their April Fool's Day joke.
Google Book Search Scratch and Sniff
Google Book Search has a new section allowing users to "scratch and sniff" certain books. Users are asked to "...please place your nose near the monitor and click 'Go'", which then "loads odors". When clicking on "Help", users are redirected to a page in a book that describes the origins of April Fools' Day.
Inside Google Book Search Blog: "Google Book Search now smells better"
A little easter egg was added, where a user can click the file menu and directly under new document is "New Airplane" which immediately opens a copy of a Google branded paper airplane. To reach the file menu, click the new menu, then "Document" then a new window opens. Entering the Konami Code in a document then pressing enter will make the document flip left to right. Doing so again will make it flip back.
Google Manpower Search
Google launches Manpower Search (谷歌人肉搜索) in China (google.cn). The feature was presented as being powered by 25 million volunteers who conducted searches around the clock. When the user entered a keyword, volunteers would search any possible answers from a mass of paper documents as well as online resources. The user was expected to get the search result within 32 seconds. The "search" button would avoid the user's cursor, making it tricky to click on the button.
Google announces plans to, on April 22, 2008 (Earth Day), shorten all conversations over Google Talk thereby reducing the energy required to transmit chats in an effort to reduce carbon output.
Google launched their "Wake Up Kit" as a calendar notification option.
The 'wake up' notification uses several progressively more annoying alerts to wake you up. First it will send an SMS message to your phone. If that fails, more coercive means will be used. The kit includes an industrial-sized bucket and is designed to be connected to your water main for automatic filling. In addition, a bed-flipping device is included for forceful removal from your sleeping quarters.
Google announces a joint project with the Virgin Group to establish a permanent human settlement on Mars. This operation has been named Project Virgle. The announcement includes videos of Richard Branson (founder of Virgin Group) as well as Larry Page and Sergey Brin (the founders of Google) on YouTube, talking about Virgle. An "application" to join the settlement includes questions such as:
After the user submitted the application, the site notifies the user that the user is not fit for space, or that the user's application is fine and "all you have to do is submit your video" [as a response to their video on YouTube]. As a result, an open source Virgle group has been established, OpenVirgle. On the FAQ page, the final question is "Okay, come on – seriously. Is this Virgle thing for real?" The reply links to a page that tells the user it's an April Fool's joke, and then mentions that the user "Dragged us out of our lovely little fantasy world, to crush all our hopes and dreams."
Virgle Application Page – Virgle: The Adventure of Many Lifetimes
Google's Orkut displayed its name as yogurt, Google Bang, Inc.
On April 1, 2008, all featured videos on the UK and Australian homepages, and later, all international homepages, of Google-owned YouTube linked to a video of Rick Astley's song "Never Gonna Give You Up", causing all users of the website who clicked on featured videos to be Rickrolled.
This was the first year YouTube participated in Google's April Fool's Day tradition.
Google runs on Microsoft Windows IIS/3.0
google.com.au reported as if it ran on IIS/3.0 and google.com on Apache/0.8.4 (on Linux).
The announcement of CADIE was made on 31 March 2009 11:59 pm by the CADIE Team, not on April 1. The announcement on the Google blog was made at 2009/04/01 12:01:00 am.
The introduction page and all of the references to CADIE in Google's Products were taken down on April 2, replaced with a message stating:
We apologize for the recent disruption(s) to our service(s).
Please stand by while order is being restored.
However the technology page describing the technical capabilities of the software remained at: Technical Description 
When using Google Books or GMail, a user would come across an announcement dated March 31, 2009 at 11:59:59, declaring a new "Cognitive Autoheuristic Distributed-Intelligence Entity". CADIE is also mentioned on the gBall FAQ page: "Google's new CADIE technology will interpret the data obtained from each ball to provide useful tips to owners". There was also a link on Google's Homepage for CADIE, and a blog entry in Google's official blog.
CADIE technology is also used to generate "senryu" (a type of Japanese poem similar to haiku) based on search terms for certain Japanese queries.
The Google Search homepage had a link to the CADIE announcement, stating that "For several years now a small research group has been working on some challenging problems in the areas of neural networking, natural language and autonomous problem-solving. Last fall this group achieved a significant breakthrough: a powerful new technique for solving reinforcement learning problems, resulting in the first functional global-scale neuro-evolutionary learning cluster." The page links to the blog below.
On mobile devices, a link shows up to Brain Search, which uses CADIE technology to "index your brain". This[dead link] is what it all looks like from a mobile device.
On April 1, 2009, YouTube gave some users a look at a new "viewing experience" when they selected a video within certain areas such as the "recommended for you" section. This new interface caused the whole layout including the video the user was watching to flip upside down. Although the option was not visible for some, it could be viewed by adding &flip=1 to the end of a video URL. Adding &flip=1 to the end of a video URL no longer causes this effect, and the video loads normally. A page on "tips for viewing the new layout" suggested users hang their monitors upside down from the ceiling, although the layout did not reverse mouse-control.
When one is using the Gmail service, they will notice that it has a new option, named "Gmail Autopilot" in which the service would analyze an email. On that page it says under the FAQ section,"You can adjust tone, typo propensity, and preferred punctuation from the Autopilot tab under Settings." However, if a person logs into their Gmail account and goes under the Settings tab they will notice that there is no Autopilot tab. The program could be customised to contain certain types of grammatical or spelling errors, as well as complexity and length of the sentence. It also has a way of responding to relationship related messages, such as if someone spoke aggressively, even in a humorous way, the system would "terminate relationship."
Google Australia announced the development of a ball that will change how Australian Football is played the world over. The newest football technology—"gBall" —is a prototype ball for use in the Australian Football League with GPS.
Google Australia announces ("New! Get the newest football technology – gBall.") that they are developing a prototype ball for use in the Australian Football League with GPS. Apparently, the ball will measure the location, force, and torque of a kick, and "vibrate if player agents or talent scouts want to speak to you". Google claimed that the ball will cost $10 with a cost-per-kick set of payments in addition to the basic fee.
A blog post to the Google Analytics Blog investigates the analytics reports of CADIEs activities.
Google's CADIE has a recommended places to visit using Google Maps. Viewing "CADIE's recommended places for humans" one will see each of her suggested places listed, that, when clicked, displays a photo and humorous commentary.
There is also a "CADIE's recommended places for humans" link in Google Maps, which leads to the "Panda Mapplet" and includes several marked locations with "CADIE's" commentary. Under Redmond WA a link is listed which will rick roll the viewer.
Screenshot of Wikipedia.org on April 2, 2009 using Chrome "3-D". Note the red/blue glasses toggle switch at the top of the browser
A home of Google Mail was offered rendering web pages in Anaglyph 3D, "powered" by CADIE. A 3D effect was actually possible with this browser, but it only made the window appear to be sunken into the monitor.
Google announced a new Google Earth powered by CADIE, which claimed to allow the user to see ocean terrain imagery from the world's most advanced submarine, explore the deep sea, soar with CADIE in real time, view CADIE's Recommended Summer Vacation, and chat with CADIE, among other options.
The Google Code Search homepage is featuring LOLCODE examples.
CADIE is set to write code by itself based on specified features; however all that is returned is bad code or witty criticisms of the user's request and choice of programing language, recommending the use of INTERCAL.
CADIE's source code was supposedly uploaded to Google Code, but she changed her mind and replaced it with a "fun program" consisting of 31 lines of INTERCAL. When executed, this program prints out the message "I do not shake
Google Book Search
CADIE recommends some books at Google Book Search homepage. Also, when viewing a book, there is a Generate book report button. When clicked it says "Gotcha! It's April Fools' Day! Sorry, but you'll have to actually read the book yourself."
Google Docs on Demand
Google has announced new Google Docs features enhanced by CADIE Add subliminal messages and images to documents. If a person makes a new presentation and looks for the subliminal message and image buttons under the insert menu they will notice it is not there. 
Google Mobile has a link to "Brain Search". The instructions are to "Put phone to forehead for brain indexing" and "Think your query". When the user clicks "Try Now", a page loads with "Brain indexing" status. When indexing is complete, a button comes up with "search me". By clicking this button, the user is directed to fake search results. There are several possible results:
What's the name of that woman by the window? She's my boss's boss, but, oh man, is it Suzanne? Susan? Blanche?
Should I order the pizza? I don't remember if it makes me gassy.
When is Mom's birthday? I should send her a card.
Knol was updated so that all of the featured articles were about Artificial Intelligence, with a message from CADIE indicating that this "improvement" was for the good of mankind.
In keeping with the CADIE theme Google has altered the server HTTP header to contain the name of various AI entities, including HAL 9000, WOPR, and GLaDOS.
Other server HTTP headers found were IIS/Bob (a reference to Microsoft Bob), IIS/Clippy (a reference to Clippy), IIS/3.0, Netscape iPlanet, Chrome/3.0, Google Operating System (BETA), CERN/3.0 (a reference to CERN HTTPd), Apple (a reference to Apple II), IRIX, MCP, Apache/0.8.4, Conficker, and Skynet.
Oil Tanker Data Center
During the last minutes of Google's Data Center Efficiency Summit,Urs Hoelzle presented in a "special topic": Google had bought an oil tanker, the "M/S Sergey", where Google's data center containers were being submerged in oil tanks to enable extremely high-efficiency cooling. The presentation can be seen in the video, and includes slightly customized Wikipedia images from the article Oil tanker, including a retouched photo of commercial oil tanker AbQaiq and the oil tankers side view graphic.
Even though Google did apply for a US patent to build data centers on cargo ships and oil cooling is an existing technology, summit attendee James Hamilton believed this topic to be an April Fools joke. The ship's name "M/S Sergey" is also likely to be a pun on Google's co-founder Sergey Brin.
Google and Topeka, Kansas, Switch Places 
In early March, the city of Topeka, Kansas, temporarily changed its name to Google in an attempt to capture a spot in Google's new broadband/fiber-optics project. Then, on April 1 (April Fools' Day), Google jokingly announced that it would be changing its name to Topeka, to "honor that moving gesture" and changed its home page to say Topeka in place of the Google logo.
Google Books available in Anachrome 3D
Google books introduced a feature which allows any book to be read in 3D, assuming the viewer has appropriate glasses. It was enabled by clicking the "View in 3D" button in the menu bar above the book. This feature was removed after April 1, but on June 29, 2010, Google announced its restoration. Google also released the latest form of 3D glasses, similar to the pairs one would use today when seeing a film.
Store anything on Google Docs
Google announced that Google Docs will have the capacity to upload anything, including physical objects like keys, remote controls, etc. The site declared that one could use this to find items like keys using CTRL-F and send objects around the globe by "uploading" and "downloading" them, at the low price of $0.10 per kg.
Search results generated in different units
Google's search results page displayed the time taken to load the results in different units from seconds. Several of these are pop culture references, as with 1.21 gigawatts, while others refer to slang:
The logo of YouTube was overlaid with ASCII text repeating the character "1". The YouTube logo was a reference to some videos having a new quality setting, namely "TEXTp". According to a notice underneath the videos, viewing the video with this quality setting enabled allowed YouTube to save one US dollar ($1) per second on bandwidth costs. The notice also remarked on the source of this new "feature," wishing the reader a happy April Fool's Day.
However in accordance with the announcement, the video quality on many videos was indeed able to be set to 'TEXTp' and video output was rendered through an ASCII filter. This feature was removed on April 2, 2010.
Animal Translator BETA
Google placed a link on the main page, advertising a new Google Animal Translator service to add to their Language Translator service. Clicking the link would take the user to a page advertising an app for Android phones for the translator, with the tagline being "Bridging the gap between animals and humans".
Once the app is installed on an Android phone, it provides some amusing translations depending on the animal selected.
Standard Voicemail Mode for Google voice
Google placed a New! Standard Voicemail Mode link in the Google Voice main page.
Google added an "evil bit" to their AJAX APIs, to aid in generating an appropriate response to nefarious deeds. If an evildoer is "detected", the code returns with, among other things, "For Great Justice", a quotation from the video game Zero Wing.
Wave Wave Notifications
Google Wave can be set to have a human being wave at by the user to notify the user of a change to a Google Wave. The user can also select the volume of the human notifier from a list of silent, medium, loud and vibrate. They can also select which human notifier they want, including Ashton Kutcher, Dr. Wave, Grandma, Werner Heisenberg, and Puppy. Clicking on any of the links on the new notifications page redirected the user to a Google help page, alerting them that it was an April Fools' joke, but also that email notifications are possible.
Google Annotations Gallery
The Google Annotations Gallery ("GAG") is an exciting new Java open source library that provides a rich set of annotations for developers to express themselves.
Japanese Input System
Google's proposed keyboard includes a single key for each Japanese character.
Disemvoweling on Google Mail
The English-language home page of Google Mail, including its logo, was disemvowelled. A post on the GMail blog was created to address the issue, claiming that they had encountered a server error which firstly made the datacenters fail to render the vowel 'a' before failing to render the vowels, and were working on the problem. They also claimed to be investigating whether the letter 'y' was impacted.
Chrome Sounds (Google Chrome Extension)
Google created a new extension, Chrome Sounds, after "months deep in psychoacoustic models, the Whittaker-Nyquist-Kotelnikov-Shannon sampling theorem, Franssen effects, Shepard-Risset Tones, and 11.1 surround sound research". The extension provides audio for actions performed within the Google Chrome web browser. For a few interesting sounds, try going to different countries' localized Google pages. The full list of sounds that this extension makes can be found by going to the Chrome Tools menu, choosing Extensions, turning on developer mode, and viewing the source of the extension.
Google Analytics Goes Back to Hits
Google decided that hits really is the only metric for tracking web site usage.
Life size Picasa
Google offered an option which allows the user to print lifesize cardboard cutouts of all of their photos.
Google announced a reward program for Google Reader, known as ReaderAdvantage™, in which they would assign points to users depending on the number of items read on Google Reader. The rewards were different badges, which, on visiting the ReaderAdvantage™ page and clicking on the enroll button, shows this page.
A button was added to the video player which, when clicked, would apply a video filter to the video and replace the audio with a recording of Rhapsody Rag, a piece typically played as background music to silent movies in 1911. If subtitles are enabled when watching the video, intertitles will be displayed containing the dialogue. The upload page also featured an option to "send a horse-drawn carriage to me to pick [the video] up". In addition, a few videos were made parodying several viral videos, such as the "Flugelhorn Feline".
A body gesture oriented way to send and view mail through Gmail. In the "How it Works" Section it reads "Gmail Motion uses your computer's built-in webcam and Google's patented spatial tracking technology to detect your movements and translate them into meaningful characters and commands. Movements are designed to be simple and intuitive for people of all skill levels." An overview video presented by Gmail product manager Paul McDonald explains Gmail Motion's "language of movements that replaces type entirely" while a mime artist performs the full-body Gmail actions.
Upon clicking the "Try Gmail Motion" button, it explains to the user about the prank, and says "Gmail Motion doesn't actually exist. At least not yet..." The page also offers a preview of the features of Google Docs Motion.
Using Gmail Motion's technology, Google has promoted the BETA version of Google Docs Motion which "will introduce a new way to collaborate – using your body" in their Documents, Spreadsheets, Presentations, Drawings, and Document List tools.
A YouTube video was posted by Google showing a "Google Autocompleter" employee explaining the job. Also, a job opening was featured for an "Autocompleter." Clicking on the "Add to job cart" or "View cart" links to a Google search for "google april fools day pranks".
Google Chrome launched a new website called "Chromercise", which aims to increase people's hands' strength and dexterity while browsing the web faster, and also allowing their hands to fit "into sleeker, sexier gloves". On the website, they also gave away free Google Chrome finger sweatbands for a limited time.
Due to the large-scale devastation from the 2011 Tōhoku earthquake and tsunami, in lieu of a traditional April Fools hoax, Google Japan featured many never-before featured drawings from its 2009 Google Doodle competition, themed "What I Love About Japan" drawn by Japanese schoolchildren, saying "We promised that only the top prize winners would be featured on Google, but as this is the only day where lies are forgiven, we have obtained the other children's understanding." As a small concession to the usual festivities, the Google Blog mentioned, "This year's April Fools joke has been postponed until next year. Next year's April Fool's joke has been postponed until the year following that."
Google teleport 穿越搜索 is a service that allows user to time travel. The site is written in Simplified Chinese. It claims that it can take the user on a journey through time and space in first-person.
Google Maps used to display a dragon in Germany's biggest forest, the 'Pfälzer Wald'. Also a shark in Holland's lake called IJmeer, East of Amsterdam was featured. When viewed in Earth Mode or Google Earth. These can be rendered in 3D. There is also a narwhal in the Thames in London, outside Millbank Tower. The Loch Ness monster also makes an appearance in 'Loch Ness'. A giant red lobster sits atop the Zakim Bridge in Boston. Also a pink elephant at "Amphitheatre Parkway, Mountain View, CA".
Google Translate for Animals
Google UK purportedly offered a version of Google Translate which could be used to talk with animals.
Google Voice has a new function that makes users spell out common words like “embarrassed”, ”dizzy” or ”Czechoslovakia”, before they connect the user's call in order to prevent embarrassing messages.
AdWords announced a new format, Google Blimp Ads, that would be flying over major cities starting in May.
The announced sessions for the Google I/O conference for software developers were changed to include talks featuring technologies from the late 1990s.
Contoso has gone Google
On the Google Enterprise Blog, Google announced that Contoso (a fictional company used by Microsoft in Microsoft's product documentation materials) has switched from Microsoft Office and Microsoft Exchange to Google Apps. The post included references to 2007's TiSP and 2011's Gmail Motion jokes.
Meow Me Now Mobile
On the Google Mobile Blog, Google announced a new mobile-based search option for Android and iOS devices which locates kittens near the user's current location.
The blogging service Blogger announced that it was being acquired by Google, even though it has been part of Google since 2003.
Google Maps 8-bit for NES
Google partnered with Square Enix and announced a "NES version" of their Google Maps service, to be released "as soon as possible". The version would be released in NES and Famicom versions (the Famicom version would feature voice input by using the second controller's microphone). In the meantime, Google added a "Quest" layer to the Maps website, which features 8-bit tile-based graphics and sprites on landmarks, both made by Google and by Square Enix (using the Dragon Quest game series' graphics).
Improved Japanese Input System
Google's proposed improved keyboard based on the experience with Japanese input system from 2010.
The YouTube Collection
The YouTube Collection
YouTube added a small disc on the right side of the YouTube logo, which when clicked leads to a page about a service called "The YouTube Collection". It claimed to be an at-home experience of YouTube and made everything from videos to comments physical, including a postal mail commenting service. At the bottom of the website, it had a fake shipping form which after filled said "Your order has been placed. Due to heavy demand, your anticipated delivery date is: JUNE 16, 2045" and in small grey text at the bottom said "Also, April Fools."
Google Street Roo
Google announced they will deploy a ‘roo force’ of more than 1,000 big red kangaroos who will capture up to 98% of the Australian bush within the next three years.
Underwater Image Search
An underwater image search experience developed by Google China.
Chrome Multitask Mode makes it possible to browse the web with two or more mice at the same time. Clicking the "Try Multitask Mode" button initially creates one fake mouse that moves around the screen, and over time adds several more. Clicking the "Exit Multitask Mode" button shows an April Fools message.
Google introduced the Elegantizr framework. To use it, one just needs to insert the following line of HTML:
Upon insertion, every text begins with APRIL FOOL and an emoticon, before moving on to the regular text.
Piano & Guitar Analytics Playback
Google Analytics allows the user to playback their website statistics on piano and guitar.
Google announced a partnership with NASCAR to help create self-driving vehicles to compete in stock car racing. The "I'm Feeling Lucky" button on Google's site was also changed to "I'm Steering Lucky." Google racing is available at http://www.google.com/racing/
Gmail Tap for Android and iOS doubles typing speed with a revolutionary new keyboard. The system involves a keyboard with three keys: Morse code "dash" and "dot", and a spacebar (along with backspace). Shortly before midnight, on March 31, 2012 added Gmail Tap – Android and iOS Application utilizing Morse Code instead of onscreen keyboard. Selecting Download App for Your Phone produces the message: "Oops! Gmail Tap is a bit too popular right now. We suggest you try downloading it again on April 2nd." Clicking Retry button will produce "It's still April 1st, 2012. You'll have to wait till April 2nd to download Gmail Tap." After clicking the retry button the page will say "Still trying to download Gmail Tap? Check back next April 1st to see if it is available...you never know.". On Gmail's Facebook page, they also posted about a Morse Keyboard.
Really Advanced Search
A link on the bottom of search results pages titled Really Advanced Search takes users to a search page where they can filter their search results by, among other things, subtext or innuendo, page font (Comic Sans or Wingdings), loanword origin, or future modification date. Clicking on the "Advanced Search" button to actually run the search query redirects users to search results for "April Fools".
Click-to-Teleport extensions] allow potential customers to instantly teleport to the business location directly from a search ad in a matter of seconds. This teleportation technology shortens the "online-to-store" conversion funnel by providing searchers with an easy way to visit any business and convert. On average, advertisers using Click-to-Teleport extensions have seen their offline sales increase by 3600%.
Solving the increasingly frustrating problem of accessing mobile internet on rotary phones across the US, Google is announcing GoRo. GoRo aims to fix the problem that 100% of people using rotary phones have trouble accessing a website.
Jargon-Bot for Google Apps
Jargon-Bot instantly recognizes business terms and provides real-time, in-product jargon translation into plain English.
Google TV Click
Innovative remote control application for phone and tablet lets users interact with shows and movies as they are playing.
Google Voice for Pets
Google introduced special Voice Communication Collars that fit around animal necks and use a series of sensors to record audio directly from animal vocal cords. Using a WiFi network, audio messages are uploaded to Google Voice within seconds. Alternately, a tiny micro-LED emitter built into the collar can project a keyboard onto the floor, so the animal pet can tap its front paws to send text messages. To understand animal language, Google took their voicemail transcription engine and combined it with millions of adorable pet videos from the Internet, training it to translate cat meows or dog growls into English.
$1 Google Offer for Parking Karma
Google Offer for unlimited good parking karma $1 takes the stress and guesswork out of finding a good spot by providing the following service:
prime spots when you need them,
repels parking tickets,
includes 1 space buffer on each side,
shopping cart protection plan,
no parallel parking for first 6 months.
Canine Staffing Team
Google revealed that dogs at Google offices go through the same detailed recruitment and hiring process by Canine Staffing Team as human Googlers do before being welcomed to the Googleplex.
Analytics Interplanetary Reports
While currently users can only get a partial picture of website visitor location, Google Analytics is expanding beyond Earth by announcing new Analytis Interplanetary Reports to help users understand visitor activities from neighboring stars and planets. Users will also be able to drill down on each planet to see greater detail, e.g. which colony or outpost visitors came from, similar to the city drill down available for Earth today.
"Did you mean: Beyonce" and Kanye West in the Play Music Store
Kanye West bugdroid appeared in the Play Music Store. While searching anything, "Did you mean: Beyonce" came up all the time.
Google Edible fiber
Google released a video on YouTube claiming it invented an edible fiber which could "take feedback from the body, determine which nutrients are needed and target delivery to the specific organs that need those nutrients. The video actually links to Google Fiber, a broadband internet service by Google.
On December 23, 2012, Google launched "Google Santa Tracker". It is supposed to help "track Santa's path". It features a dashboard, a gps, which features an animated drawing of Santa and 9 reindeer traveling over seas, and other views of Santa.
YouTube contest for the best video
In YouTube's sixth April Fools prank, YouTube joined forces with The Onion, a newspaper satire company, by claiming that it will no longer accept new entries. YouTube began the process of selecting a winner on April 1, 2013 and would delete everything else. YouTube would go back online in 2023 to post the winning video and nothing else. After that, on April 1, 2013, YouTube briefly repeated the "YouTube Collection" joke from April 1, 2012. They also broadcast a live ceremony in which two "submission coordinators" continuously read off the titles and descriptions of random videos (the "nominees") for twelve straight hours, claiming they would do hold the same ceremony every day for the next two years.
Treasure Hunt on Google Maps
Google Maps allows the user to start a treasure hunt by selecting the "Treasure" view from the top right. Google Maps notes that the "system may not be able to display at higher resolutions than paper print" and that the user should "take care when unfolding the map to avoid ripping it." Also, the user is warned to 'beaware [sic] of pirates'. In reference to the TV show Portlandia, an image of a bird was placed on Portland, Oregon.
On April 1, 2013, Google launched its fake product - Google Nose BETA. This product claimed to "search for smells". Google staffers even went far enough with their creativity to cover mobile devices in this April Fools' prank with the "Android Ambient Odor Detection" which was said to collect smells from phones. "The product intersects 'photons with infrasound waves' and 'temporarily aligns molecules to emulate a particular scent.'", the Google Nose BETA landing page said. Huffington Post said ,"It all sounds so great." They made an introductory video explaining the purported intention behind the new feature. According to the clip, their mobile aroma indexing program created a 15 million scentibyte database of smells from all over the world.
The addition of an "Add new awesome application" button.
Google Japanese Input Patapata Version
Google introduces a new Japanese input system. Users repeatedly tap a single button to cycle through different letters. A brief pause confirms the current letter and advances the cursor to begin entering the next one.
The name "Patapata" likely references a Japanese word for Split-flap display, onomatopoeically dubbed "Patapata-shiki" for its distinctive fluttering sound when updating. There also exists Patapon, where "Pata" is one of the sounds made with a drum; "pata-pata-pata-pon" happens to be one fo the first rhythms the game teaches the user.
International Space Station on Google Analytics
Google Analytics fooled users by showing that their website was being viewed from the International Space Station control room on the real-time page.
Google SCHMICK (Simple Complete House Makeover Internet Conversion Kit)
Google SCHMICK allows the user to redesign his or her street viewed house so that the user can "fly the Australian flag" outside the user's house 
Google Fiber Poles
Google Fiber to the Pole provides ubiquitous gigabit connectivity to fiberhoods across Kansas City. This latest innovation in Google Fiber technology enables users to access Google Fiber's ultra fast gigabit speeds even when they are out and about.
Google Wallet Mobile ATM
Google announces the release of the Google Wallet Mobile ATM. The mobile ATM device easily attaches to most smartphones and dispenses money instantly and effortlessly – forever ending the user's search for the nearest bank or ATM. The Google Wallet Mobile ATM technology allows the user to enter the amount of money he or she want to withdraw directly to a phone or use voice-activated dispenser. Unlike traditional ATM’s, the Google Wallet Mobile ATM even dispenses rare two and fifty dollar bills, as well as more practical one dollar bills.
Levity Algorithm in Google Apps
Google introduces the Levity Algorithm in Google Apps to help users spice up even the most boring of work days.
Updated Export and Send-To features on Google Analytics
Google updated the Export and Send-To features for Google Analytics to give users even more options and support some of our favorite legacy technology: 3.5" floppy, CD-ROM, papyrus, sticky note, carrier pigeon, fax, telegram, telegraph.
Self-Writing Code Program
Google developed self-writing code program. Now that Google engineers are not spending their time at the desk programming, they have plenty of time to collaborate with teammates, attend talks and events on campus, go for a workout at the gym or try out a new cafe. Google always encourages employees to have a full life outside of the office and now Google employees have tremendous work-life balance.
Google Search Cold Trends
The least searched topics on Google, "Cold searches" is the way to discover new unique things that nobody else is into.
Real April Fools' Day product launches
Google has chosen April Fools' Day and the day before it to announce some of their actual products, as a form of viral marketing.
Shortly before midnight on March 31, 2004, Google announced the launch of Gmail. However, many people believed it was a hoax, because free web-based e-mail with one gigabyte of storage was unheard of at the time.
On March 31, 2010, YouTube implemented its new video page design, which had been revealed two months earlier.
On April 1, 2010, Google Street View received a new feature to toggle anaglyph 3D images. It was available by clicking on the icon depicting "pegman" wearing a pair of red/cyan glasses. The icon was present until April 8, when it was removed. The 3D view is now available by right-clicking on the image and selecting the 3D mode option or by pressing "T" or "3" on the keyboard. The images are genuine anaglyph images, with the red/cyan offset being greater for closer objects.
On April 1, 2013, Google announced Google+ Emotion. Google+ can now 'plumb the emotional depths of everyone in the photo, then summarize their feelings with a beautifully crafted, emotion icon'