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An artist’s impression (top) of an asteroid breaking up as it struck the moon (right) 3.8bn years ago, while below shows the projectile striking the moon to form the Imbrium Basin. Note the unusual grooved impact pattern. Image credit: Pete Schultz

The man in the moon has a black eye and now we know how he got it. A giant dark area – right eye of the Man in the Moon – was created when a massive a(...)

Comets can be 50% water and asteroids range from 2% to 20%. Research shows, however, that four-fifths of the moon’s water was delivered by asteroids. Illustration: Lunar and Planetary Institute/David A Kring

On the face of it the moon is a desert devoid of water, but in fact there is plenty of it there hidden away under the surface. Now scientists believe (...)