The first image of a black hole was captured in 2019 by scientists who turned Earth into a giant radio telescope. But what actually are black holes? And what would happen if you fell into one? In this ...

The first man shot into space must have a good chance of getting down alive One necessary precaution is some way saving him in case the launching rocket misbehaves soon after leaving the ground.

Last September, Emmett Shear, who was later temporarily CEO of OpenAI during an organizational shakeup, cautioned that artificial intelligence was moving too quickly: “[I]f we’re at a speed of 10 ...