Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4.5 billion years ago and ending with the emergence of complex, multicelled life-forms ...

In a study published in Precambrian Research Monday by scientists from Cardiff University in Wales, researchers found environmental evidence that complex life existed 1.5 billion years earlier ...

The Precambrian eon is vast, almost unimaginably so. In fact, before some fossil discoveries were made late in the 20th century, it was considered unknowable -- evolution's dark ages. The ...

A team has now identified the oldest known ecdysozoan in the fossil record and the only one from the Precambrian period. Everyone has a past. That includes the millions of species of insects ...