For most of the 20th century, the model of human origins was a tree: with the trunk dividing into branches, and then twigs.

Hair, nails, and horns, all made up of keratin, are some of the hardest and most resilient structures in animals. Inside zebrafish cells, keratin plays a distinct role, giving them the strength they ...

Brain size and bipedalism are the most likely drivers of our species’ right-hand dominance, according to new research ...

Humans are overwhelmingly right-handed, but scientists have long struggled to explain why no other primate species shows ...

Sooner or later, we all contend with graying hair. But what causes strands of hair to lose pigment and, in some cases, regain ...

How can you get gray hair in your 20s? Well, now, I’m 29, and I catch little gray hairs sprouting from my roots often, no ...