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Evolutionary biologist Greger Larson of the University of Oxford notes that, "Thus far, the lineages of wolves that likely gave rise to dogs has not yet been discovered and it's possible that these puppies could be on that lineage, which would be very exciting."
The brain of one puppy is well preserved, while the stomach of the other was mostly full of twigs and grass, which has scientists wondering whether the animals were not exclusively carnivorous or whether they started eating grass after they were trapped by a mudslide and began to starve. In fact, about 15 percent of the food eaten by many carnivores (wolves, coyote, big cats) is plant material of some kind.
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