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[–]Aimee_Chanellor 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

How do they know the moon has caves?

Caves are typically the byproduct of erosion.

I can't actually think if another way for them to form.

I'm a spelunker. That funky spelunk.