Why do you have five fingers? Why not ten, or twenty, or one? Why do so many animals have five fingers? Five seems to be the perfect number for most hands. Oddly, the first vertebrates to come onto ...

If we look across the whole of the mammal branch of the tree of life, we find there are many groups of mammals that have ...

When Josefin Stiller was growing up in Berlin, she loved reading about Greek gods in an encyclopedia of mythology. She often lost track of their relationships, however—their feuds, trysts, and ...