National Geographic
MONSTERS of the Ancient Seas | National Geographic
Alive for the first time in 82 million years: Styxosaur: 40 feet long, and half of it was its gigantic neck. Dolichorhynchops: fast swimmer, a relic of when much of North America was under water. Hesperornis: A bird that couldn't fly, but was a really good swimmer.
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MONSTERS of the Ancient Seas | National Geographic
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Published Jul 1, 2010