These large, flightless birds have powerful, muscular legs and tough, prehistoric-looking feet with claws that can deliver a ...

A pair of canines found in Siberian permafrost were wolf sisters that died shortly after eating.

As a result, purple and magenta are known as "nonspectral" colors, because they don't really exist as actual electromagnetic ...

Researchers armed with the Hubble Space Telescope have revealed that some of Uranus' largest moons have one side brighter ...

Earth's magnetic field and oxygen levels have increased more or less in parallel over the past 540 million years, suggesting ...

Space weather experts warn that a "moderate" geomagnetic storm could rock Earth over the weekend, potentially lighting the ...

Breathing patterns among humans are so unique that they can work as an identification tool, scientists report. They propose ...

Low iron levels can flip the genetic switch on a mouse's sex during development, causing XY embryos to grow female features.