A small brown mouse has just done something no mammal has ever done before: give birth on Earth after spending part of its ...

Seals give birth only when conditions are right. After mating, a female seal can delay implantation of the embryo in the ...

Over 130 mammal species can delay embryonic development, giving their offspring the best possible chance of survival in ideal ...

In a major breakthrough for space research, mice that spent two weeks aboard China’s Tiangong space station have returned to ...

Animals reproduce in a variety of fascinating ways. Some species, including humans and many other mammals, give birth to live young that develop inside the mother’s body. Others reproduce through less ...

Despite their underwater habitat, whales are mammals. Mammals are not solely terrestrial; some, including whales and dolphins, are fully aquatic the University of Michigan Museum of Zoology reports.