The space rock that hit a Gloucestershire town last year held water similar to our planet's oceans.
Water accounted for up to 11% of the meteorite's weight - and it contained a very similar ratio of hydrogen atoms to the water on Earth.
Some say this could have come from a bombardment of icy comets - but their chemistry is not a great match.And the fact it was recovered less than 12 hours after crashing means it had absorbed very little earthly water, or indeed any contaminants. This is the type of chemistry that could have been a feedstock for biology to begin on the early Earth.Camera footage of the fireball has allowed researchers to work out a very precise trajectory.
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