When Rutgers evolutionary biologist Robert Trivers began to suspect that his co-author, William Brown, had faked the data on a widely circulated study, he was placed in the unenviable position of bringing the fraud to light. It has not been easy.

Are men hard-wired to put the needs of their nieces and nephews over the needs of their own children? A University of Utah anthropologist conducted a mathematical analysis that could explain why some men go out of the way to care for the offspring of a sister.

A new study purports to use evolutionary psychology to explain why men fall asleep after sex, and what it actually means. The study is being widely reported as proving that men only fall asleep after sex to avoid giving affection or commitment to their female partners. Or maybe it proves that men who fall asleep after…

Evolutionary psychology has a lot of ideas that are, well, pretty nutty. The latest theory argues that social prejudice can be fought by being more careful about the spread of disease. It's definitely nutty...but it might also do some good.

In general, the more aware of reality you are, the more likely you are to survive. But sometimes lying to yourself has its advantages. Possessing an over-inflated belief in yourself can help you perform better than accurately knowing your abilities.

When you happen upon a couple of bear cubs in the woods, what's the first thing that should come to mind? If you answered "I wanna squeeze 'em," you're wrong. It should be "where's the mom?" And with good reason. Numerous non-human mammals are known to exhibit heightened levels of aggression in defense of their young.

There's an old bit of folklore that children tend to more closely resemble their fathers than their mothers. There's a possible evolutionary explanation for this, and one study seemed to confirm it all. Here's why it's all bogus.

Social scientists have long known that people manage their reputations by modifying their behavior in public. But new research out of Australia now shows that this tendency to "act appropriately" extends beyond our actions and into our moral judgments.

There are lots of possible explanations for why humans became bipedal, including changing ecosystems and food resources. But what if it was just so it was easier for early humans to beat the crap out of each other?

Men and women say "I love you" at different points in their relationships, and they say it for very different reasons. It turns out that even the timing of "I love you" is all about following our ancient evolutionary drives.