-
3.8billion years ago
The beggining of life forms that we know of. -
3.5 billion yeaes ago
The oldest single celled organisms fossils date back from this time. -
3.4 billion years ago
Rock formationsin Western Australia date back from this time -
3 billion years ago
Viruses are preasant bythis time. -
2.3 billion years ago
Earth freezes over, due to lack of volcanic activity. -
900millionyears ago
-
800million years ago
The first multicellular organisms overcome their first split, sponges and Eumetazoa. -
770 million years ago
The planet freezes over again. -
680 million years ago
The ansestor of cnidarians breaks away from other animals. -
575 million years ago
Strange life forms called Ediacarans appear around this time and persist for 33 million years.