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 ...

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 ...

Many factors can contribute to geographic color variation, including natural selection, sexual selection, and genetic drift. In squamates, phenotypic plasticity can also play an important role in ...

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 ...

How are reptiles capable of generating such a diversity of bright colors? And how is it possible that within a single population of the same species, different individuals exhibit strikingly different ...

Flower colour variation is a fundamental trait in angiosperms, serving not only to enhance the visual appeal of flowers but also to mediate interactions with a wide range of pollinators. The diversity ...

A variety of animals have male-specific ornament traits and these ornaments are favored by female choice. Which male traits are preferred by females often varies among females. Genetic mechanisms that ...

Lingering question: Do variations in scent correspond to variations in color? Spring weather in Boulder is difficult to predict because it seems that it is not a time of gradual warming but rather ...