Look sideways without turning your head. Another person can instantly see where you are looking because your dark iris moves against a bright white background. This may be a small…
“Nice” Was Once an Insult Today, calling someone nice is a gentle compliment. In medieval England, however, it could mean that the person was foolish or ignorant. Nice entered English…
Why do we support opinions as they become more popular? Have you ever chosen a restaurant because it had a long line outside? Or started watching a show simply because…
Corruption is sometimes described as a problem of dishonest politicians taking bribes. But its real damage goes much deeper. Corruption is essentially a hidden tax on an entire society. The…
Why do we tend to think that things that happened recently are more likely to happen again? The availability heuristic is the mind’s shortcut of judging how common, likely, or…
Among mammals, fathers usually contribute surprisingly little to raising offspring. Humans are unusual: across many societies, fathers may provide food, protection, teaching, childcare, or resources for years. Why? One evolutionary…
“Disaster” Was Once Written in the Stars Today, a disaster can be an earthquake, a financial collapse—or simply a badly burned dinner. But the word originally described something far above…
Human babies are unusually costly. They grow large brains, remain dependent for years, and often have younger siblings who also require care. A mother raising several dependent children entirely alone…
A young chimpanzee becomes self-sufficient relatively quickly. A human child may remain dependent for nearly two decades. At first glance, this seems like an evolutionary disadvantage: childhood consumes enormous amounts…
From a narrow evolutionary perspective, menopause is puzzling. If natural selection favors reproduction, why do human women commonly live for decades after they can no longer bear children? The grandmother hypothesis proposes…