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Apes are among the most intelligent animals on Earth, closely related to humans and deeply social in the wild.

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Adenomyosis is a structural gynecological disorder -- it affects the endometrial cells. See how adenomyosis and fertility are related.

Learn about the Batmobile and how it comes to life in Batman Begins and where to buy related products.

Diamonds are rare? Not really. They became an engagement ring staple, thanks to a clever, if deceptive, public relations campaign.

Is Major Depressive Disorder related to adoption? Learn about the relationship between Major Depressive Disorder and adoption.

Organisms not related to each other can develop similar physical attributes without even exchanging notes.

Pikas are little mammals that, though they may look like rodents, are more closely related to rabbits.

Aardwolves aren't closely related to either aardvarks or wolves, but these little hyenas resemble both in some ways.

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