These cetaceans first appeared in the fossil record about 50 million years ago and have been …
[source: http://ecowatch.com/2014/04/25/15-facts-about-whales/]
15 Weird and Wonderful Facts About Whales
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These cetaceans first appeared in the fossil record about 50 million years ago and have been …
[source: http://ecowatch.com/2014/04/25/15-facts-about-whales/]
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