Add Yahoo as a preferred source to see more of our stories on Google. Two women pose with a frog. Paleontologists have discovered the earliest molecular evidence of the toxic pigment that causes red ...

A pigment in red hair may have a secret superpower: It can turn a toxic threat into a splash of color. Scientists studying the orange-to-red melanin in bird feathers have found that its production can ...

Using advanced electron crystallography techniques, researchers at Stockholm University have succeeded in determining the structure of the historically significant red pigment carmine. It turns out ...

A pigment that makes feathers and hair orange helps prevent cellular damage by removing excess cysteine from cells. Pheomelanin is an orange-to-red pigment that is built with the amino acid cysteine ...

Seeing a color in nature is one thing. Recreating colors artificially is an entirely different challenge—one with some unexpectedly high stakes. Practically anything human-made is of a certain color ...