Some media attention has been given lately to the discovery and dating of the preserved footprints of humans and extinct animals in the dry bed of an ancient lake in White Sands National Monument. The DNA of pollen associated with the prints suggests an age of twenty thousand years. That puts the arrival of humans in the New World much further back in time than previously thought. It also means that the humans were coexisting with some fearsome large predators including Saber-toothed Cats and Dire Wolves.
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