Sep 27 2016
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By namanknowledge Animals

Fact #1196: Dogs smell each others’ behinds because anal glands in dogs transmit how a dog is feeling — anxious? playful? — which allows one dog to get to know the other.

Source: http://www.nytimes.com/2016/10/11/science/dogs-can-train-us-to-have-a-better-sense-of-smell.html?rref=collection%2Fsectioncollection%2Fscience

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