Hibernation is a remarkable adaptation that mammals living in colder regions have developed to survive the winter months when ...

At first glance, this mammal looks like a horse gone terribly wrong. But, in reality, Chalicotherium is far from a botched ...

A study reveals how seasonal brain shrinking helps some mammals survive winter, offering new insights into brain plasticity ...

Monotremes are unique mammals that lay eggs, but their limited geographic ranges make them vulnerable. We explain why.

Whales, dolphins and other marine mammals are highly social, but those social ties can also help diseases spread through ...

The new research is the first to look back at early mammals in full color. Using advanced fossil imaging methods and a thorough examination of the pigment-producing cells present in living mammals, ...

Whale ancestors were terrestrial mammals that walked on four legs. This bone structure that helped them walk eventually ...

Whales, dolphins and seals live in tight-knit societies that rival primate groups in complexity, and those same bonds are ...

A surprising new study has found that blocking reproduction in some mammals may increase their life expectancy by an average ...

A large-scale analysis of 117 mammal species found that preventing reproduction is associated with longer lifespans, suggesting a strong link between reproductive activity and life expectancy. Why do ...