This skywatching quiz will test your knowledge of how eclipses, when to see them, and what makes each one so spectacular.

If you use ChatGPT and other AI tools to cheat, your teacher can catch you. If you use them to study, you can actually learn a lot more. The choice is simple.

The world’s shortest IQ test, the Cognitive Reflection Test (CRT), uses three questions to tell if you’re smart enough to go toe-to-toe with bona fide geniuses. It seems easy at first, but it requires ...