THERE'S NO SUCH THING AS SPECIES:

Tibetan Mastiffs may have wolves to thank for their high-altitude adaptations. Scientists suggest in a paper published Tuesday in the journal Molecular Biology and Evolution that the dogs interbred with their wild relatives that were already well-adapted to the Tibetan Plateau, capturing some of their genetics in the process. 

But this isn't just a dog's tale. This new research suggests the canine's story mirrors how scientists think the people of Tibet adapted to the high-altitude conditions. Previous research suggested the humans got their genetic adaptations by interbreeding with another human species, the now-extinct Denisovans.

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