but the team note that their paper is not the final word on biological sex and size. Having only been able to include 7% of mammals in their study, future research with more species might reveal ...

How did those little creatures transform into not only the hippo and the mole rat but also today's vast panorama of mammals with fur, hooves, and fangs, as well as others that swim hairless ...

Birds are often imagined to be less intelligent than mammals, perhaps with the exception of crows and parrots. However, their brains are not as radically different as you might think.

But the mammals did not simply step into ecological roles vacated by the dinosaurs. It took several million years for the mammals to evolve even moderately large body sizes, and the world they ...

Marine mammals, but especially the larger, wide-ranging predators such as whales, dolphins, and polar bears, simply do not belong in captivity. The 6 th edition of The Case Against Marine Mammals in ...