The combined weight of all the planet's ants and termites outpaces that of all living wild mammals. That wasn't the case in ...

If all the world's a stage and all the species merely players, then their exits and entrances can be found in the rock record ...

Below is a chart showing the conservation status of all mammals and several major mammal groups, including bats, carnivores, insectivores, marsupials, primates, rabbits and hares, rodents, and ...

The latest addition is the Marine Organismal Body Size (MOBS) database, an open-access resource that—as its name implies—has collected body size data for more than 85,000 marine animal species and ...

Here’s how it works. This early mammal could grow to be about 100 pounds, much larger than mammals that lived before the end-Cretaceous extinction. (Image credit: Artwork by H. Sharpe) ...

Sometime during the Cretaceous Period, 125 million years ago, a feisty mammal the size of a domestic cat attacked a dinosaur three times its size.

Why do cats generally live longer than dogs? New research suggests that longer lifespans of mammals like cats could be linked to their bigger brains and more complex immune systems.

After the dinosaurs were wiped out by a massive meteor strike 65 million years ago, tiny mammals ruled the Earth. But they quickly evolved to be as big as dinosaurs, then evolved to be smaller ...

Randall Munroe of XKCD has compiled a chart in which all the world’s land mammals have been sorted according to weight. A quick glance shows that we humans — and our livestock — take up a ...

We are at a critical time and supporting climate journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen ...

Researchers have demonstrated that mammal biodiversity loss is part of a long-term trend lasting at least 125,000 years. As archaic humans, Neanderthals and other hominin species migrated out of ...