Color change in animals is a response shaped by evolution. Each species has developed its own method and reason for this ability, like an overreliance on light or temperature cues, or a physiological ...

In nature, it's not uncommon to observe animals that change color with the seasons. You may have heard of the arctic fox or the mountain hare, which are white in winter and brown in summer. This ...

Blue sharks possess a secret hidden in their skin: a sophisticated arrangement of microscopic crystals and pigments that create their brilliant blue appearance — and may allow them to change color.

When snow covers Idaho’s mountains and forests, one native animal quietly transforms its coat — turning white to survive the season. The snowshoe hare turns white in the winter and grayish-brown ...