Hummingbirds can see an impressive array of colors that are invisible—or appear very different—to the human eye, scientists reported June 15 in the journal Proceedings of the National Academy ...

The sun is obviously the brightest object in our sky. The moon is second, because it reflects the light of the sun. If you pass sunlight through a prism, it will stretch into a spectrum of colors ...

Color perception, and our enjoyment of it, is part of our evolutionary legacy. The human retina is sensitive to wavelengths of light from about 400 to 700 nanometers. (A nanometer is one-billionth ...

Birds boast some of the most vibrant colors among terrestrial animals. The tropics are often renowned for the brightest birds, but U.S. birds also display a wide array of striking hues.

Black on the color spectrum. While there’s no black in a rainbow, photons anywhere in the electromagnetic spectrum can be seen as black. Or in some cases, they can’t be seen at all!