Why incest is best bet for one animal

December 27, 2014 1:22 PM

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Mammals tend to avoid incest as a rule, mainly due to the resulting health issues in offspring. There are exceptions, however, and a team of researchers has discovered—for the banded mongoose, at least—incest isn't always such a bad idea.

The animals have an oddly high degree of incest as they tend to live in close-knit groups of about 18 throughout their lives, according to a study in Biology Letters.

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