Scientists have discovered bones of giant sea reptiles called mosasaurs in West Africa that are 72 million years old. A new Smithsonian exhibit will feature mosasaur fossils and reconstructions showing how these enormous predators looked. Paleontologists have been studying the mosasaur fossils to learn about a time long ago when the Atlantic Ocean was new. Listen to hear what they are learning about these ancient sea monsters and the world in which they lived.
Story Length: 5:08
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