Add Yahoo as a preferred source to see more of our stories on Google. Polish Prime Minister Donald Tusk said Poland is ready for "any decision aimed at destroying objects that might pose a threat to ...

When an object from another star system enters our solar system, it's usually a cause for scientific excitement, not alarm. But a leading Harvard scientist is urging the public to take a closer look ...

A Harvard physicist has asserted that new images of the Manhattan-sized interstellar object rocketing through our inner solar system back his claim that it’s not a comet — but instead possibly an ...