Two laboratories at Penn State set out to show how an obscure undersea microbe metabolizes carbon monoxide into methane and vinegar. What they found was not merely a previously unknown biochemical ...

We have only one example of biology forming in the universe—life on Earth. But what if life can form in other ways? How do you look for alien life when you don’t know what alien life might look like?

(CN) — Evidence of fresh water deep inside Earth has thrown a wrench in scientists' longstanding theory of a salty, ocean-smothered Earth existing four billion years ago. Fresh water, which is ...