In the Proterozoic eon, which lasted for nearly 2 billion years, the life on Earth didn’t live on the land, but in the sea!
Stromatolites: Rocky mounds of micro-organisms.
The only life on Earth were single celled organisms.
600 million years ago, bigger life forms appeared.
Soft bodied organism fossils are hard to find, but Trilobites were found in South Australia. The Proterozoic eon finished 541 million years ago. By this time, the first ‘big predators’ had arrived. Anomalocaris, Pikaia, and Opabinia. This was in the Cambrian eon, which ended 485 million years ago.
Past Sea creatures
By Furman University
A five eyed, prehistoric, many spined predator.
Pikaia
dinosaur.wikia.com
Anomalocaris
crittersquad.com
