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 ...

The racecourse for the six-legged race is marked by two vibrant, complete circles of rainbow colors. On the walls there are baby-blue clouds, chalkboards with playful doodles and timetables ...

Normally, when you look at a rainbow, the Earth’s horizon in front of you hides the bottom half of the circle. But if you are standing on a mountain where you can see both above and below you ...