SEA MONSTERS "Back From the Dead" | National Geographic
Alive for the first time in 82 million years: Cretoxyrhina: Back when the the western United States was beneath the sea, a huge shark roamed those waters. Protestega: the great granddaddy of today's turtles was as big as a car; & Platecarpus: a scary, 24-foot long predator that swam in shallow waters like a snake.
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SEA MONSTERS "Back From the Dead" | National Geographic
• SEA MONSTERS "Bac...
National Geographic
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