Welcome back to another 50-50 quiz! These 40 general knowledge questions cover everything from history and science to ...

From using words to overthrowing regimes, shared awareness is necessary for people to coordinate. The cognitive scientist explains to Nature how it works. When Everyone Knows That Everyone Knows...: ...

Source: Scribner / Used with permission. In a New Yorker cartoon about marital relations, a husband tells his wife, “Of course I care about how you imagined I thought you perceived I wanted you to ...

Elephants have chests. All animals have chests. Insects also have chests. An insect’s body is divided into three parts: the ...