Our earliest mammalian ancestors avoided the dominant dinosaurs by only coming out at night and having uniformly dark, ...

Underneath all that hair, polar bear skin is actually black. The black skin ... sorts of colors: yellow, gray, orange, and even green. That's because polar bear fur is transparent and hollow.When ...

The black fur allele has fitness costs but also confers higher immunity ... At that locus, each wolf has two copies of a color gene, of which there are two possible alleles: gray or black, the latter ...

The number of endangered Mexican gray wolves has increased for the ninth year in a row, but advocates say recovery isn't occurring fast enough.

Its winter fur is long and bushy, and predominantly a mottled gray in color, although nearly pure white, red, or brown to black also occur.

The team used mice with black fur to observe whether their hair became ... The results showed that mice developed gray hair less frequently than those that did not receive luteolin.

and a black-tipped tail are some of the characters by which the gray fox differs from the red fox. Other differences include coarser fur, a shorter muzzle and legs, dark brown eyes, and a mane of ...