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Moon basin gouged by pieces of proto-planet

The moon rolled with bigger punches over its life than we thought, copping a 250-kilometre-wide object that broke into bits some four billion years ago. Belinda Smith reports.

the large circular feature in the top half of this image is the largest basin on the near side of the moon.
the large circular feature in the top half of this image is the largest basin on the near side of the moon.