Underground Animals: Cool Cave Critters, Part One

Cave animals just might be some of the strangest animals on Earth. Adapted to living somewhere with little...  ...to no light and practically no vegetation, these animals have evolved to survive in extreme environments a...  ...lowing from outside the cave and trogloxene...

http://www.neatorama.com/2011/01/26/underground-animals-cool-cave-critters-part-one/