Posts from this author will be added to your daily email digest and your homepage feed. Deep within the acidic clouds of Venus, astronomers have detected a tantalizing gas never found on the planet ...

It could be atmospheric chemistry. Or pollution from unseen volcanoes. But there's a chance — a not insignificant chance — that scientists have made the first clear discovery of life beyond Earth.

Scientists have uncovered communities of animals such as tube worms and snails living in volcanic caves beneath the seafloor, revealing a previously unknown but thriving ecosystem. Researchers made ...