Harvard's Avi Loeb warns interstellar comet 3I/ATLAS could be alien tech. Experts weigh in on planetary defence and the risks ...

We may receive a commission on purchases made from links. Are we alone in the universe? It's a huge question with no easy answer. And, following on from that, if we aren't alone, what would beings ...

Presidential curiosity isn't always about diplomacy or the economy—sometimes, it's about what might be flying overhead. Across decades and party lines, several U.S. presidents have displayed a ...