Stephen Hawking

Time travel is possible – but only if you have an object with infinite mass

Time travel is possible – but only if you have an object with infinite mass

The concept of time travel has always captured the imagination of physicists and laypersons alike. But is it really possible? Of course it is. We’re doing it right now, aren’t we? We are all traveling into the future one second at a time.

Black holes aren’t totally black, and other insights from Stephen Hawking’s groundbreaking work

 Black holes aren’t totally black, and other insights from Stephen Hawking’s groundbreaking work

Mathematical physicist and cosmologist Stephen Hawking was best known for his work exploring the relationship between black holes and quantum physics. A black hole is the remnant of a dying supermassive star that’s fallen into itself; these remnants contract to such a small size that gravity is so strong even light cannot escape from them. Black holes loom large in the popular imagination – schoolchildren ponder why the whole universe doesn’t collapse into one. But Hawking’s careful theoretical work filled in some of the holes in physicists’ knowledge about black holes.