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 ...

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 ...

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 ...