But is it a planet or what?

If and when SETI discovers alien life, a revised Declaration of Principles guarantees once the discovery has been verified, ...

Planets that once lived only in pulp novels and movie concept art are now turning up in real data. Astronomers are not just finding distant worlds, they are cataloguing places with molten surfaces, ...

Scientists have updated global guidelines for announcing possible evidence of intelligent alien life, aiming to prevent ...