New work shows that physical folding of the genome to control genes located far away may have been an early evolutionary ...

Male spotted ratfish have true teeth on a forehead appendage used for mating. Across vertebrates, teeth share many defining traits. Regardless of their shape, size, or sharpness, they stem from the ...

"Sharks have a very different physiology because they have to handle salt water. For example, in a human being, one measure ...