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 ...