A 4.9 Million-Year-Old Ecosystem Is Beautifully Preserved In A Tennessee SinkholeThousands upon thousands of prehistoric animals are pristinely preserved at the site of an ancient sinkhole-pond in the US. The mind-blowing site is a snapshot of a beautiful ecosystem that thrived nearly 5 million years ago, a time when rhinos, tapirs, giant salamanders, red pandas, and giant flying squirrels...
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