In last week’s The Universe column, I fielded a reader’s question about galaxy collisions in an expanding universe. The answer deals with vast distances, inscrutable forces and the ultimate fate of ...

The late Professor Stephen Hawking had a chilling "dark forest" theory about alien life 15 years ago – and it could be more plausible than ever. Earlier this year his predictions about aliens ...

The interstellar object known as 3I/ATLAS is stirring up a whirlwind of speculation as it nears Earth, with theories ranging from it being a natural comet to an alien spaceship. This debate has been ...

Roughly 66 million years ago, scientists believe an enormous meteor, dubbed Chicxulub, smashed into the Earth in an extinction-level event that wiped out 75 percent of life, including the vast ...