Looking for molecular evidence of life on other worlds is tricky, but a test based on the reactivity of carbon compounds ...

This ship was huge. It was like a city-sized ship. And there was hundreds of beings on board,” said Debbie Solaris, a ...

Chalk up another victory for “Conan the Bacterium”—a rugged germ that fresh research suggests could conquer the solar system.

A resurrected ancient enzyme is helping scientists test how reliably Earth’s oldest rocks record signs of life.