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 ...

This stunning photo of a full-circle rainbow is among the winners from a world weather photography competition. The Royal ...

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.