In what’s considered one of the finest examples of natural selection in action, Tibetans have acquired the ability to thrive at extremely high altitudes. Incredibly, researchers say the gene required for this adaptation was inherited from the now-extinct Denisovans. Tibetans can thrive at altitudes that would wreck most humans. Normally, exposure to altitudes exceeding 15,000 … Continue reading Study: Extinct Human Species Gave Tibetans Their High-Altitude Gene