The higher your vantage point, the more likely you’ll see more of the rainbow’s circle. Chen Hui/VCG via Getty Images The legend goes that there is a pot of gold hidden at the end of every rainbow.

When Emily Caffrey, Ph.D., CHP, talks to students about health physics, she usually leads with this: No two days are alike. “I don’t like to be bored,” said Caffrey, assistant professor in the ...

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 [email protected]. Can rainbows form in a circle? – Henry D., age 7 ...