Precambrian time covers the vast bulk of the Earth's history, starting with the planet's creation about 4.5 billion years ago ...

Add Yahoo as a preferred source to see more of our stories on Google. A fascinating fossil discovery in remote South Australia sheds light on an important chapter in the history of life on Earth: the ...

During the Proterozoic era, oxygen produced by photosynthesizing bacteria collects in the oceans and then in the atmosphere. Iron present in exposed rocks reacts with this oxygen, and rust colors the ...

A bizarre, tentacled creature that lived in the deep ocean 560 million years ago resembled a goblet crammed full of wriggling fingers. It may be an ancient relative of modern jellyfish and the ...

Molecular clocks, which use the mutation rate of biomolecules to deduce how long ago two species diverged, and phylogenetics (the evolutionary relationships between species) can tell us when sea ...