Sleep is a universal biological state that allows all animals, from mammals to amphibians, fish and even insects, to restore ...

Sleep looks peaceful on the outside, but inside the brain, it is anything but ...

In the past, many scientists believed that only mammals and birds could feel or think in complex ways. Reptiles, fish, and insects were seen as simple creatures that reacted purely on instinct. But ...

The pallium is the brain region where the neocortex forms in mammals, the part responsible for cognitive and complex functions that most distinguishes humans from other species. The pallium has ...

A new study analyzing diet, average plasma sugar levels and cancer prevalence in some 273 vertebrate species showed surprising results. The study found no significant link between diet and plasma ...

Mammals, including humans, stand out with their distinctively upright posture, a key trait that fueled their spectacular evolutionary success. Yet, the earliest known ancestors of modern mammals more ...

Before dinosaurs walked the Earth and tens of millions of years before the first mammals appeared, distant mammal relatives with long, serrated canine teeth were the dominant carnivores on land.

Reptiles as we know them today may have evolved about 30 million years earlier than we initially assumed, new footprints reveal. According to a study published Wednesday (May 14) in the journal Nature ...

Two exceptionally well preserved reptile skeletons dating back to the Triassic period have totally rewritten our understanding of the evolution of skin appendages such as feathers and hair. Known as ...