The Google Earth Day doodle is a first of its kind doodle that "presents one of the Internet's favourite pastimes: a goofy quiz," that at the end of it tells you which animal you are the closest to.
The Google Earth Day quiz works on "any up-to-date browsers on your mobile or desktop browsers, including the Android and iOS Google Apps."
The first Earth Day was celebrated on April 22, 1970 and was founded by US Senator Gaylord Nelson. The original Earth Day was attended by about 20 million Americans. The Earth Day movement went global in 1990 and is now celebrated in over 175 countries across the globe. April 22 was officially designated as the international Earth Day by the United Nations in 2009.