The development of hair was of central importance for the evolution of mammals and thus also of humans. However, the evolutionary origin of the genetic program of hair was previously unknown.

Paleontologists have discovered the earliest molecular evidence of the toxic pigment that causes red hair in the fossil record — in 10 million-year-old frog fossils. The ancient amphibians had ...

Figure 1: Antibody labeling in sacculus and cerebellum. Figure 2: Western blots of proteins from cerebellum and sacculus. If calretinin is present at millimolar concentration in tall hair cells, which ...