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. An ...

Researchers have uncovered unexpected diversity in the genetic processes that determine the sex of the African clawed frog, a significant discovery in what was already one of the most widely studied ...

BOSTON — A Harvard University researcher accused of smuggling clawed frog embryos into the United States was indicted Wednesday on additional charges. Kseniia Petrova, a Russian-born scientist ...

The African clawed frog is an evolutionary marvel — an entirely aquatic species with powerful hind legs, flattened bodies, ...