Earth Day 2013
It's Earth Day today according to Google's doodle. You can read more about the history of Earth Day here, which today is celebrated in 192 countries. Today's Google doodle shows the cycle of seasons represented with the rising and falling Sun and Moon in an animated Google doodle. This is Google's 13th Earth Day doodle, with each year the doodles getting more elaborate. You can take a look back at the Earth Day Google doodles over the years.