When you hear that a giant, icy mass hurtling through space has entered our solar system, your mind might leap straight to ...

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 ...