Tibetan dogs can survive at high altitudes, thanks to ancient breeding with wolves

Tibetan mastiffs thrive where most dogs and people can’t: in the thin, frigid mountain air above 4000 meters. A new study suggests they acquired this talent by interbreeding with gray wolves that already ranged to such heights more than 20,000 years ago. Intriguingly, Tibetan people received their high-altitude fitness via the same mechanism—by interbreeding with now extinc ... Read more »