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 Richmond
Bio: 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.
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