NASA's Perseverance rover discovered rocks on Mars, providing new evidence the red planet was once a wet, habitable world ...

A bizarre fossil called Prototaxites, which was the largest life-form on land 400 million years ago, may have been a completely unknown form of multicellular life, according to a new study.

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

A recent discovery on Mars has revealed something truly fascinating: massive water-carved caves that might just be hiding evidence of ancient life. These caves, which formed when slightly acidic water ...

The discovery suggests that parts of Mars may once have supported tropical-like climates, complete with heavy, sustained rainfall.

Has NASA's Perseverance rover at long last found evidence that life did indeed once exist on Mars? Well, after more than four years of scouring the Red Planet's rocky surface, the intrepid rover has ...

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, ...

More than 3.5 billion years ago, the Earth was not the hospitable world we know today. The atmosphere lacked oxygen, the seas ...

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 ...

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