The 2003 Google Earth Day doodle had some beings from outer space. Two aliens gaze at the earth sitting atop the Google logo, quite like how lovebirds on earth look at the moon.
Celebrating the 43rd anniversary of Earth Day, Google has posted a flower-themed Google Doodle on its home page. It is noon on a bright spring day on the Google Earth Day 2013 doodle. Clicking on the play button on the blazing sun sets the day and the doodle in motion.
In 2012, Google posted a flower-themed doodle on its home page. It features an animated image of blooming flowers in purple, red and yellow colours that spell Google.
In 2011, Google went interactive for it's 11th Earth Day doodle that had in it ticklish pandas, frolicking penguins, a growling lion, a cascading waterfall, waterfall climbing fish, a fish devouring bear, birds, butterflies, a koala and a jumping frog.
In 2010, Google celebrated the 40th anniversary of Earth Day and the search engine giant transformed its logo into an illustration of a forest with sunlight filtering through the leaves creating an impression of the Google logo.
In 2009, Google went partially underwater with its Earth Day doodle to highlight the rich diversity of life in the water.
The Google logo appeared as a natural rock formation with a stream running through it for the 2008 Earth Day.
The 2007 Google Earth Day doodle had the Google logo in the form of an iceberg to highlight the melting of the polar ice caps.
In 2006 the Google logo went green for Earth Day with solar and wind energy.
The 2005 edition of Google's Earth Day doodle has more members from the animal kingdom, including a squirrel and a bird family.
A happy fish with mountains in the background was the theme for Google's 2004 Earth Day doodle.
The 2002 Google Earth Day doodle did away with the two-hemispheres and replaced only one 'O' with an image of the earth but added some clouds for effect.
The first Google Earth Day doodle, back in April 22, 2001 was a simple doodle. The 'O's in the Google logo were replaced by the western and the eastern hemisphere for the earth.