Google marks Earth Day with 5 major biomes' doodles

Google has marked the Earth Day with five illustrations by doodler Sophie Diao.

The five illustrations highlight five major biomes - the tundra, forest, grasslands, desert and coral reefs, to showcase the vastness of Earth.

The doodle sees one animal in each illustration having 15-minute frame. Each time one visits Google.com, one of the five doodles randomly pops up.

Sideways view to the illustrations will also spot the Google logos.