Your Dog Is Even Smarter Than You Thought

A researcher who spent years studying canine behavior has learned that dogs have very complex inner lives.

This might not come as much of a surprise to dog lovers, but canines, according to a researcher who spent years studying them, are not only clever -- they have a conscience. While dog play may just seem like aimless fun, many behaviors, according to author David Grimm's "Citizen Canine," actually hint at the kind of sophisticated moral reasoning we once thought was limited solely to human beings. The brief video above explains the deeper significance of various behaviors, including, um, humping (and no, it's not what you think).

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