What makes this chunk of dirty ice so magnetic is not only what it is, but where it came from. 3I/ATLAS is only the third confirmed interstellar object we've ever seen passing through our solar system ...

For months, scientists and the public have squinted their eyes at photos of a blurry smudge to figure out if it’s proof that aliens exist. Discovered in July, 3I/ATLAS is not your average comet – it’s ...

When something the size of Manhattan flies through our solar system from deep space, scientists usually watch with a clinical interest. For Harvard astrophysicist Professor Avi Loeb, though, the ...