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.

Have you ever seen a rainbow smile down at you ... typically forming up to a quarter-circle centered on the point in the sky ...

It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something ...

Following the sweeping path of a cold wave through the Arctic, the skies were alight with rare polar stratospheric clouds, which presented a rainbow-like show throughout the sky. Images of the ...

Have you ever seen a rainbow in the sky? Rainbows happen when sunlight passes through raindrops in the sky. When this happens, light becomes separated into a rainbow of colors—red, orange ...