That quest has blossomed into astonishingly fruitful research areas like cosmology, numerical general relativity, and quantum gravity. General Relativity has brought us wormholes, evaporating black holes, and the Big Bang theory; it underlies the discovery that the universe is expanding and that so-called exoplanets are much more common than anybody thought; and it has utterly redefined the way we think of our own place in the universe, ultimately even calling into question whether this universe is the only one.