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Why does a dog stick its head out of the window?

By Ohio.com Published: July 5, 2013

Ever wonder why your dog sticks its head out of the window while you drive around? 

Mental Floss has a pretty succinct answer. Dogs have 225 million scent receptors, compared to humans who have 5 million. Still confused? This quote sums it up nicely: 

When a dog sticks its head out the window, it’s like pigging out at a hi-definition all-you-can-smell scent buffet.

Read more over at Mental Floss right here.

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