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10 creatures that thrive in caves

By: Bryan Nelson on Jan. 10, 2011, 1:08 p.m.
A Pseudoscorpion

Photo: Gilles San Martin/Flickr

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They look like the hybrid offspring of a spider and a scorpion, but pseudoscorpions belong to an arachnid order all to themselves.

Although not all pseudoscorpions live in caves exclusively, many species do. For instance, scientists have recently discovered a new species of pseudoscorpion with venom-filled claws living in the deep granite caves of Yosemite National Park.