These Animal Couples Prove That Looks Don’t Really Matter. Aww.

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These Animal Couples Prove That Looks Don't Really Matter. Aww.

Sexual dimorphism is a biological term for the differences between men and women of the same species. Any hack comedian can tell you the difference between men and women personality-wise. On the scientific side, however, stark physical differences between males and females aren’t reserved for Seth Rogen movies. Here are some of the world’s species […]

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