Thinking at cosmic and subatomic scales requires plenty of math—or some visual metaphors.

The natural world rarely behaves the way we expect. Physics bends intuition. Biology ignores neat categories. Space refuses to be reasonable. Some facts sound like they were invented for a science ...

Have you ever had a childhood memory suddenly go from "cool story" to "wait, that’s actually terrifying"? That’s the vibe ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Can rainbows form in a circle? – Henry D., age 7 ...