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 ...

Fossil skull of the extinct cynodont therapsid Cynognathus crateronotus. Cynognathus was a powerful predator that was close to being a mammal, but not quite. It has been found in several parts 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 ...

A nocturnal existence is a way of life for numerous mammals, from bats that swoop through dark skies, to skunks that emit their noxious spray under moonlight, to the majestic lions, tigers and ...

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 ...

Over 300 million years ago, our ancestors diverged from the ancestors of reptiles and began the evolutionary journey towards becoming mammals. What were these earliest ancestors like? For one, they ...

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 ...