While Google is the most used search engine it has some hidden features you might not know about or even knew existed, to begin with here are the ones that I know of:

1. When you type in “Google in 1998” you’ll be put into the beta version from 1998.
2. Type in “Google binary” and you guessed it its the regular google search engine but all in binary.
3. Type in “Zerg rush” to begin a mini game where you have to rapidly click on the O’s to stop them as long as possible
4. Type in “recurion” which will always be misspelled and i’ll let you read it definition for why that is.
5. Type in “Google gravity” and its the Mr. Doob link and when click the link its the ordinary google search engine but once you move around everything will fall on the bottom of the screen hence the name “Google gravity”.
6. The same goes with “Google space” but instead of falling to the bottom of the screen it will start to float once moved around.
7.  Search for “Pacman” you can play a google doodle version of Pacman.