Articles

Five basic facts from the father of geometry.

Euclid's fourth axiom says that all right angles are equal. But isn't that obvious?

In 2004 Stephen Hawking famously conceded that black holes do not devour all information when they swallow matter — seemingly resolving the black hole information paradox that had perplexed physicists for decades. But some argue that the paradox remains open and we must abandon our simple picture of spacetime to unravel it.

Why there is a limit to how much better computer chips can get and what it's got to do with black holes.

How to solve an ancient problem in a few folds.

Does light have weight? Newton thought so. His laws predicted that gravity would bend light, two centuries before Einstein's revolution.