Mammals are not especially diverse. Roughly 6,800 mammal species are known to exist, compared with about 8,800 species of amphibian, 11,000 species of bird and 12,500 of reptile. Yet when most people ...

A plantation worker photographed this new genus of mammal in New Guinea, thought to have been dead for 6,000 years.

Invasive species are all over America, and it’s very likely you may have seen them in your own backyard. Some species are so ...

Confused about native, non-native, introduced, and invasive species? This guide breaks down the definitions, explains how scientists classify them, and explores real-world examples like zebra mussels ...

Despite a common narrative that male mammals tend to dwarf female ones, fewer than half of mammalian species display that pattern, a new study suggests. By Emily Anthes Female elephant seals are not ...

The pygmy long-fingered possum and the ring-tailed glider, two marsupials believed to have died out thousands of years ago, are still alive in Papuan Indonesia.

Despite their underwater habitat, whales are mammals. Mammals are not solely terrestrial; some, including whales and dolphins, are fully aquatic the University of Michigan Museum of Zoology reports.

Scientists discover thousands of new species every year, and a surprising number of those creatures end up named after pop ...

Small mammals are early warning systems for environmental damage, but many species look almost identical, making them hard to track. Scientists have developed a new footprint-based method that can ...

Move over monotremes and the range of rodents known to glow: over one hundred other furry creatures do, too, new research shows, vastly increasing the number of mammals known to show the spooky trait.