150 Million-Year-Old Sunken Slab Beneath Siberia
Scientists have located a piece of Earth's ancient history buried 1,550 miles below its surface.

Study Casts Doubt On 'Snowball Earth' Theory
A study that applied innovative techniques to previously unexamined rock formations has turned up strong evidence on the "Slushball Earth"side of a decades-long scientific argument.

Geobiologists Solve 'Catch-22 Problem' Concerning The Rise Of Atmospheric Oxygen
Two and a half billion years ago, the process known as photosynthesis suddenly gained the ability to release molecular oxygen into Earth's atmosphere, causing one of the largest environmental changes in the history of our planet.