Plant extinctions endanger other organisms, ecosystems and the ability of humans to survive on our planet.
Researchers predict that the average total body mass of mammals will drop by 25 percent over the next century.
A harness taken from the beluga whale bore the words "Equipment of St. Petersburg."
Elephant skin is covered in an intricate network of minuscule crevices that retain water and mud, providing a number of benefits.
Tree shrews are a small mammal species native to southeast Asia.
The findings could help to shine a light on the evolutionary history of mammals.
"You haven't lived until you've put your arms around a mammoth femur trying to measure it," Smith said.
Duckbills, beaver-tails...and antibacterial milk?
You can thank the dinosaur extinction for our ability to brunch.
The 4-year-old Tonkean macaque exhibited prolonged attachment to the infant's desiccated corpse before starting to chew its remains.
The findings could potentially shed light on the behavior of other animals where female aggression is high.
The winter cold aggravates the giant mammals' arthritis.
But they have not been found in humans.
It represents not only a new species but a new genus as well.