Consequently, birds dominated the niches occupied by mammals and many became flightless.

It happened seventy million years ago when the dinosaurs were suddenly wiped out and replaced by mammals.

Other researchers are comparing the enzymes used by various mammals to synthesize, process and store fat molecules.

The major alternative light source is infrared, which is usually not detectable by mammals or birds.

He went in depth about the interaction between plants that have adapted to seed dispersal by birds and mammals.

The most striking example is the replacement of dinosaurs by mammals.

A tusk is an elongated long tooth possessed by certain mammals.

Fences have been built to protect the single wild plant from grazing and trampling by introduced mammals.

The loss of tetrachromatic vision by mammals as compared to other tetrapods.

It is the earliest known example of gliding flight by mammals, scientists say.