Earliest animals evolved in the mid to late Proterozoic Eon and lie deep in the fossil record. Please give special attention to the photo credit, as it is from a participating researcher not from ...

The Proterozoic eon was the gathering up of oxygen in Earth's atmosphere, and the Phanerozoic eon coincides with the major diversification of animals, plants, and fungi.

The Proterozoic Eon witnessed the emergence of some of ... The cycle also involves the ocean, plants, animals, rocks and decaying organisms. While the ocean absorbs vast amounts of carbon from ...

Single-celled algae called acritarchs and the Ediacaran animals vanish from the fossil record at the end of the Vendian, the period that closes the Proterozoic era. If they were wiped out by an ...