7 Oct 2020, 13:00 UTC
General Relativity is one of the most successful, if not the most successful, scientific ideas of all time.
Developed by Albert Einstein over many years early in the early 1900s, it describes the nature of space and time, and gravity's role in both. He proposed that space had a shape that could be bent, warped, by the gravity of massive objects in it. Also, space and time were inextricably connected, two sides of the same spacetime coin.