Genetic correlation estimates typically assume that mating is random. But in the real world, partners tend to pair up because of many shared interests and social structures. Many estimates of how ...

Statistically speaking, more educated people tend to weigh less. That correlation alone, though, doesn’t really tell you much—you could make a parlor game out of coming up with plausible explanations.

The fact that taller people also tend to be slightly smarter is due in roughly equal parts to two phenomena—the same genes affect both traits and taller people are more likely than average to mate ...