Modern cone snail shells are washed in color and full of intricate patterns. These aren't just pleasing to the eye; they also help scientists tell different species apart. But after millions of years ...

Snail shells are often colorful and strikingly patterned. This is due to pigments that are produced in special cells of the snail and stored in the shell in varying concentrations. Fossil shells, on ...

The colorful, speckled eggs of modern birds are an innovation inherited from their nonavian dinosaur ancestors. Researchers found no traces of pigment in eggshells belonging to a long-necked ...