A fossil of a primitive lizard with its tail wrapped around its young discovered in Canada is the first known example of parental care in the animal kingdom. The fossil, which includes the remains of ...

New study reveals that nocturnality has older origin than previously thought. Synapsids, living about 300 million years ago, were probably active at night. Most living mammals are active at night (or ...

From saber-toothed synapsids to global collapse, the forgotten predators of the Permian ruled a world on the brink of ...

Nocturnal behavior of animals was taking place long before the first mammals walked the face of the Earth, according to new research. Mammals are mostly nocturnal species, and many others are active ...

Most mammals around today are active at night or during twilight hours. For a long time, we thought that the transition to nocturnal behavior happened early in mammalian history around 200 million ...

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 ...

Most living mammals are active at night (or nocturnal), and many other mammal species are active during twilight conditions. It has long been thought that the transition to nocturnality occurred at ...