In a classic test of fairness called the ultimatum game, apes will dole out an equitable share of their bananas — and when they don't, their partners will complain, a new study shows. >>Read More

Lately, however, a new cohort of scientists have been challenging the very existence of the gender differences in sexual behavior that Darwinians have spent the past 40 years trying to explain and justify on evolutionary grounds. >>Read More

Dog owners everywhere like to take their dogs to the park to play. But is their behaviour best described as "play"? >>Read More

The study of babies and young toddlers is a perplexing business. Even the most perceptive observers can be tempted to see what isn’t there. “When our infant was only four months old I thought that he tried to imitate sounds; but I may have deceived myself,” Charles Darwin wrote in “A Biographical Sketch of an Infant,” his classic study of his own son. >>Read More

New research suggests wearing heels forces women to walk in a way that exaggerates their femininity. >>Read More

Dutton describes psychopaths as brilliant, calculating, often highly intelligent people, who feel no emotion and don't even understand what an emotion is or why non-psychopaths feel them. >>Read More

Monkeys might not be known for their generosity, but when they do seem to act selflessly, a specific area in their brains keeps track of these kindnesses. >>Read More