The strongest hints yet that Mars once hosted living microbes are no longer theoretical models or ambiguous chemistry. They ...

An ancient and enormous organism called Prototaxites, initially found to be a type of fungus, may actually be an unknown ...

Add Yahoo as a preferred source to see more of our stories on Google. A biosignature is any characteristic, element, molecule, substance or feature that serves as evidence for past or present life. It ...

The ancient Egyptians believed that life on earth was only part of an eternal journey that ended not in death, but in eternal ...

A mudstone sample from Jezero Crater shows textures and minerals that on Earth often form through microbial activity. Scientists caution that nonbiological processes could also explain the features, ...

Mars is starting to look less like a dead world and more like a planet that once had the right pockets for life to take hold. The latest focus is on enormous caverns apparently carved by flowing water ...

By resurrecting a 3.2-billion-year-old enzyme and studying it inside living microbes, researchers at the University of ...

Dr. Rowan Martindale, a paleoecologist and geobiologist at the University of Texas at Austin, was walking through the Dadès Valley in the Central High Atlas Mountains of Morocco when she saw something ...

Earth's earliest life left behind very few chemical traces. Fragile remains, like ancient cells and microbial mats, were buried, squeezed, heated, and broken apart by the planet's shifting crust ...