By Kelly Murray, CNN

Editor's note: The Science Seat is a feature in which CNN Light Years sits down with movers and shakers from many areas of scientific exploration. This is the sixth installment.

As primates, humans were once furry, much like the modern chimpanzee.  But when, and why, did we lose this fur and become "naked"?

Nina Jablonski, professor of anthropology at Pennsylvania State University, studies primate evolution with an emphasis on human skin. Among numerous academic publications, she also wrote the book, "Skin: A Natural History."

CNN Light Years spoke with Jablonski about the evolution of human skin, from furry to naked.  Here is an edited transcript:

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