"A newborn's skull consists of small, soft segments connected by membranous sutures, which allow the skull to expand and ...

Carol Zimmerman, news editor at the National Catholic Reporter, went to see the purported skull of St. Thomas Aquinas. She tells NPR's Ailsa Chang about its importance to Catholics and her experience.

Fossils of the oldest saber-toothed predator are helping researchers understand the evolution of early mammal relatives ...

Eurasia and Africa were once populated by 13-tonne, 4 metre tall elephants, but their evolution has long remained a puzzle. A ...