Freshwater aquarium hobbyists often search for the ideal array of aquatic animals to include in their environment. One ...

The color red is not just for show; it has many practical uses in nature. It can convey warnings or danger, impress a mate, ...

Discover the different types of color blindness, including their causes, symptoms, and diagnosis. Learn how color vision deficiency affects daily life and how doctors treat it.

Jackson Arn looks at how the color has been used in works by Johannes Vermeer, Mark Rothko, J. M. W. Turner, Joan Mitchell, and the Pre-Raphaelite Brotherhood.

FDA debates ban on Red Dye No. 3 amid cancer concerns 04:37. The Food and Drug Administration has not formally reevaluated the safety of a food dye called Red 40 in over a decade, the agency's top ...

Whether red, orange, yellow, blue or white, the stars of the globular cluster NGC 6355 all shine like colorful jewels in this image from the Hubble Space Telescope.

The science behind blood’s color Blood gets its color from hemoglobin, the protein in your red blood cells that carries oxygen throughout your body. When hemoglobin binds with oxygen, it turns ...