The house mouse (Mus musculus) is one of the most common mammals worldwide. It can be found in all parts of the United States ...

Mixodectes belonged to an extinct family known as mixodectids and lived during the Paleocene epoch. This geological epoch ...

But marsupials remain much less common than other mammals. Opossums and other marsupials exist in North and South America, but Australia is the only continent where marsupials—and monotremes ...

The order Cetacea includes marine mammals, such as whales, dolphins, and porpoises. Fossil evidence suggests that the cetaceans share a common ancestor with land-dwelling mammals that began living ...

while rats are a more common sight after dusk. Often, the former are described as diurnal, and the latter nocturnal. But for many animals, those labels are due for a revision. Most mammals ...

"And in those cases it's quite common to find dinosaurs with feathers, but also mammals with with hair." D'Alba hopes research will continue on the mammals to learn more about those colours ...