Study reveals that women date men who look like their brothers.

Incest is generally not a good idea because children born of closely related parents can end up with genetic diseases. But some amount of genetic similarity between parents can actually be evolutionarily advantageous, as genes that evolve together tend to work best with each other in a given environment. So how do people select “optimally similar” mates? Well, these scientists hypothesized that mating with a distant relative might satisfy both ends: the relationship would be distant enough t

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