Posted by Mike at 4:00 AM

Iguanas possess a row of spines that run from the tip of their heads to the base of their tails. Discover facts about iguanas with information from a published biologist in this free video on lizards and reptiles.Expert: Dr. Alan RichmondBio: Dr. Alan Richmond is the lecturer and curator of biology at the University of Massachusetts. He is a well-published biologist and has a special interest in reptiles and amphibians.Filmmaker: Demand Media

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