There is a limit on how many times a mammal can be cloned before suffering "mutational meltdown," Japanese scientists have ...

A dead sea lion found along Morro Strand State Beach in San Luis Obispo County has tested positive for H5N1 — also known as avian influenza or more commonly, bird flu. It’s th ...

Scientists have updated the conservation status of hundreds of mammals in Argentina, adding previously unassessed species and ...

The world's oldest known mammal has been identified using dental records – predating what scientists previously thought was the first mammal to walk the Earth by millions of years – according to new ...

A remarkably well-preserved fossil discovered in China suggests that millions of years ago, some mammals actively hunted dinosaurs that were several times their size. The 125-million-year-old bones, ...

According to most experts, the first mammal was Morganucodon, a small, shrew-like rodent that appeared during the Jurassic Period, approximately 200 million years ago. It weighed a few ounces and ...

The national mammal of the United States is getting in on America's 250th birthday celebration. Three bison statues cast in ...

When a team of scientists reanalyzed a cat-sized dinosaur fossil discovered more than two decades ago, they realized the remains of the predator’s lunch had been hiding undetected in its stomach.

An expedition through an unpredictable, perilous mountain range in Indonesia’s province of Papua led to the rediscovery of a critically endangered egg-laying mammal that hasn’t been seen for more than ...

The United States has selected a national mammal—and, no, it's not humans. The American bison (Bison bison bison) is now the official mammalian species of the land, putting it on the same symbolic ...

Are you 100% sure that you’re a mammal? Do you ever worry that you might be a moth or something? Well, fret no more, we’re here to help You likely know that you’re a mammal. You have neither feathers ...