There are 6 to 8 million species of animals and plants on Earth, of which just over 2 million have only been described. Despite their extreme diversity, all living species on Earth evolved from microscopic ancestors whose current representatives are bacteria. These kinship ties are represented by the tree of life. Explore the tree of life online on our website blog and vote (by clicking here) for THE best photo taken by A Seconde student before Sunday, December 5th.