Something dramatic happened about 500 million years ago called the Cambrian "explosion," during which an incredible diversity of life forms became preserved in the rock record. These fossils ...

According to the researchers, the new findings also help explain links between the erosion of rock and the emergence of complex organisms about 530 million years ago during the Cambrian explosion.

Then, about 540 million years ago, something else changed ... dramatically. It was the time of the Cambrian Explosion, an eruption of life when Earth’s very first animals began appearing in the ...