Four billion years ago, the first aliens arrived — not in ships, but as microscopic passengers on cosmic debris. This is the story of panspermia, the theory that life began not on Earth, but far ...

'This is a special gig for me.' Puppeteer Keith Arbuthnot displays his expert performance capture skills that bring the extraterrestrial to life in this behind-the-scenes featurette. Apple TV's ...

Scientists may have just found alien life—on a distant ocean world 124 light-years away. Dimethyl sulfide, a known biosignature, was detected. This could change everything. Here's how. A Coordinated ...

Rachel Feltman: Happy Monday, listeners! For Scientific American’s Science Quickly, I’m Rachel Feltman. Let’s kick off the week with a quick roundup of some science news you may have missed. First, ...

(Image credit: ASA/JPL-Caltech) The planets around white dwarf stars might provide long-term homes for alien life, but they suffer from a fatal overheating problem. Who's going to rescue them?

Researchers observed the comet scattering water unusually early in a discovery that sheds light on how the building blocks of life are distributed across other planetary systems. Initial James Webb ...