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from About.com Education

Meet the Snakes of the Mesozoic and Cenozoic Eras

from About.com Education

Meet the Snakes of the Mesozoic and Cenozoic Eras

Megalodon Jaws by Houston Museum of Natural Science Like the sharks of today, megalodon's teeth needed constant replacing. The ones up front were the business end of the mouth, while the ones in the back were ready to take a broken tooth's place.

from Twitter

Christian Kammerer on

Christian Kammerer on Twitter: Looking down the muzzle of the Jurassic marine reptile Liopleurodon. #FossilFriday

from Twitter

Paolo Viscardi on

“Fantastic fossil whale, Cynthiacetus, on display in Paris #FossilFriday” - Paolo Viscardi

Wadi Al-Hitan, the Whale Valley in the Egyptian Sahara. Over the past 30 years or so, remarkable fossils have been discovered here that provide some of the strongest confirmation yet of the soundness fossils of whales with legs that died 40 million years ago in an ancient shallow sea.