Mammal evolution

Discoveries A six-inch fossil just rewrote a major chapter of mammal evolution

A newly discovered fossil from Mongolia reshapes how scientists understand early mammal evolution and ancient species relationships.

Health Scientists resurrect a 160-million-year-old mammal immune system and watch it evolve Rebecca Shavit

Discoveries Ancient mammal ancestors gave birth to live young, 236-million-year-old fossil finds Joseph Shavit

Health Human childbirth is not uniquely difficult relative to other mammals Hannah Shavit-Weiner