Fossil Whale Vertebrae Rough their shells were preserved in

their shells were preserved in the black marble where they are found today

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Fossil Whale Vertebrae Rough their shells were preserved inRoughly 40 30 million years old Originally mistaken for dinosaur fossils (Hydrarchos), whale bones uncovered in recent years have told us much about the behemoth sea creatures. For more than a century, our knowledge of the whale fossil record was so sparse that no one could be certain what the ancestors of whales looked like. Now the tide has turned. In the space of just three decades, a flood of new fossils has filled in the gaps in our knowledge to