TECH
07/21/2010 10:50 am ET | Updated May 25, 2011

Subterranean Living Could Await Moon, Mars Colonists

The moon's frozen tunnels could provide a natural shelter from the extremes on the lunar surface. Assuming we decide to return to the moon someday -- it's not on NASA's agenda for now -- the lava tubes would allow for ant farm-like colonies of humans living underground.

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