Photograph courtesy Karin Jaeger (Medical University of Vienna, Austria)
A new study says that our hair is related to reptile claws. Hair is made from a protein called keratin. Findings suggests that modern birds, reptiles, and mammals–as well as dinosaurs–shared an early common reptilian ancestor that had claws built from keratin more than 300 million years ago. Keratin evolved into strands of hair only in mammals.
Read more on National Geographic News.