One thing geology teaches us about is the existence of another monumental event in the history of Earth, 2.4 billion years ...

The molecules, while not a direct sign of life, still signal the existence of complex chemistry on the Red Planet.

Researchers reveal Prototaxites, a giant Devonian fossil, was not a fungus or plant but a unique extinct lineage.

Under microscopes, scientists found that giant single-cell organisms were able to vacuum up more food when they are stuck together.