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Dr. Mahmood Shivji
Dr. Mahmood Shivji of the Guy Harvey Research Institute and Save Our Seas Shark...
Fossil tooth spiral
This fossil tooth whorl of the ancient shark Helicoprion, dates back 290 million...
Two fossilized teeth from a megalodon (Carcharodon megalodon) dating back more than...
Giant Megatooth Model
A life-sized model suspended over visitors at the San Diego Natural History Museum...