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How does a rainbow look like for a dog? Blue and yellow!


Vsauce 2 presents a couple of neat facts about dogs in episode #4 of Through Glass. Dogs can see in color, but only in blue and yellow, as they have only these two cone cells in their retina, dogs bark because humans have taught them to do so and puddles had their hair cut off in the way we know to help them find the prey more easily.

Also, dogs sweat through their paws. Good to know.

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