A surprising new study has found that blocking reproduction in some mammals may increase their life expectancy by an average ...

At first glance, this mammal looks like a horse gone terribly wrong. But, in reality, Chalicotherium is far from a botched ...

Fossils reveal dinosaurs were flourishing in diverse ecosystems right up until the asteroid impact ended their reign.

Long before big cats, terror birds reigned as apex predators. Here’s how these flightless birds hunted, and why they went ...

When we think about fat, we most often think about white fat cells, which store excess calories like so many batteries, ...

Whales, dolphins and other marine mammals are highly social, but those social ties can also help diseases spread through ...

Scientists have discovered centuries-old cheetah mummies in Saudi caves, some nearly 1,800 years old, revealing vanished ...

At the bottom of Sequim Bay’s tidal channel, four-bladed turbines churn through the water. Critics have feared devices like ...

In Newen and Montemayor’s evolutionary framework, basic arousal developed first. It’s like nature’s security alarm, warning ...

Earlier studies suggest that other mammals also glow under UV light, but the reasons why have been vague. Deer use the same ...

In truth, it is not a paradox. The animals involved all seem perfectly eager participants in heterosexual behaviour, as well, so their reproduction is not compromised. It is, though, a puzzle—for ...

Scientists have successfully analyzed Charles Darwin's original specimens from his HMS Beagle voyage (1831 to 1836) to the ...