Mammal bones, especially skulls ... Despite these differences, all mammals share four traits that are shown in the diagram below: hair, mammary glands, a hinged jaw, and three tiny middle ear ...

Some ancient traits were lost and had a major influence on mammal evolution. One of the significant losses among mammal ancestors was gastralia, or belly ribs. Early synapsids like Ophiacodon had ...

It's time for another edition of the viral March Mammal Madness, which pits 64 animals against each other in hypothetical ...

They acquired certain traits that would characterize mammals ever afterward: limbs positioned under the body, an enlarged brain, a more complex physiology, milk-producing glands, and a diverse ...

The secret to titanosaurs’ remarkable biological success may be how they merged the best of both reptile and mammal characteristics to form a unique way of life. Titanosaurs originated by the ...

Inside a metal vault here in rural Vietnam is a creature believed to be the most trafficked mammal in the world. No sounds come from its cage. No squeaks or howls. A padlocked door creaks open to ...

A mouse is the most genetically scrutinized mammal; it has been edited to study the traits of countless genes, sometimes by knocking out or removing them, then observing what physical characteristic ...

The elephant won the first March Mammal Madness in 2013. / John Partipilo / The Tennessean / USA TODAY NETWORK via Imagn Images Every March, college basketball fans print out brackets and try ...

“That is a really important result for people to be aware of, especially those who are using those kinds of traits in their models.” Then, there are the ramifications for wildlife itself.

A replica fossil of the titanosaur _Patagotitan_, one of the largest dinosaurs ever discovered. It would have weighed about 70 tons (63.5 metric tons.) Spencer Platt/Getty Images News via Getty Images ...