The observable universe is a huge bubble-shaped region of space around Earth. It contains all the matter and energy that we could, in theory, observe from Earth. The universe itself may go on forever.

As a food supplement, arginine might one day help cut tumor formation and the proliferation of viruses in the body, mouse ...

A key ocean current that warms Europe is weakening, which could lead to a big chill. Scientists are now discussing how we ...

Earth has experienced several ice ages. These can emerge almost overnight in films. Although dramatic, that timeline is truly ...

New high-tech tools let scientists “tag” along with these red-footed seabirds to solve the mystery of how boobies spend their ...

Recently, AI agents undergoing tests acted in surprising and concerning ways. This wasn’t supposed to happen, so how worried ...

Meats were important, too. But throughout human evolution, fruits may have fueled much of the brain growth in our primate ...

Mammals are a diverse group of animals. They include about 6,600 known, living species. Many of them, including humans, cats ...

To show how monkeys think about math and shapes, scientists had them play games — including some designed by kids.

The largest solar telescope in the world captured swirling plasma structures on the sun’s surface. Take a look.

Corals are tiny marine animals that live in clustered groups on the ocean floor. Each group contains hundreds or even thousands of individuals. An individual coral animal is called a polyp. Polyp ...

In both cases, one adult orca held a dead sharp-tail sunfish steady. A second then slammed into it with enough force to smash ...