When viewed in enhanced color, the icy, outer world of Pluto looks very different from its more uniform, subdued hues. The hilly plains in Pluto's heart-shaped area are mostly uniform, as a flat ...

Composite images of Saturn’s rings, taken by NASA’s Hubble Space Telescope, have revealed mysterious color variations that hint that the rings could be made of materials from the outer solar system.

One of the curious things in the world of birds is why most species come in only one color form, while others come in many. We can start with the western tanager. Adult males all look the same. Adult ...

The analysis of visual color and color variation is an important exercise for numerous markets and industries. Here, we describe in detail protocols and optimal practices for dependable and sturdy ...

We review the study of flower color polymorphisms in the morning glory as a model for the analysis of adaptation. The pathway involved in the determination of flower color phenotype is traced from the ...

Have you ever wondered why some people have lighter eyes than others? Differences in iris coloration have traditionally been explained as a result of sexual selection, but a recent study led by ...