The Caves That Could Help Us Find, or Become, Aliens

From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet.

The Caves That Could Help Us Find, or Become, Aliens
From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and living safely—beyond our planet.
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