Here is an interesting story about some Indiana researchers diving in
a cave in the Carribean and finding mammal bones
of extinct species.
http://www.usnews.com/articles/science/plants-animals/2009/08/18/sloth-and-primate-fossils-found-in-underwater-cave.html
Exactly what is a "prehistoric cave?" Are they older than "historic caves?"
Can a historic cave be older than a prehistoric cave?
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