The surface of the Earth is about 70% water, but water is just a tiny percentage of the planet’s mass. That makes many scientists wonder if water was always part of Earth’s composition or if it could have been brought here from somewhere else. And if it was, how did it get here? A space rock that landed in Winchcombe, Gloucestershire, in the UK last year may be able to provide the answer. Could a meteorite have kickstarted the formation of water on Earth long before that term was confiscated by people looking for money?