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

Think you know it all? Time to put that to the test. This quiz mixes easier “common knowledge” with trickier curveballs designed to trip you up. From history and science to geography and culture, each ...

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 ...