To answer these questions, it is easiest to start with the amount of gold that humans have mined to date. The U.S. Geological ...

A pair of 14,000-year-old "puppies" found melting out of the permafrost in Siberia have undergone genetic testing, proving ...

A metal detectorist in Germany has unearthed an Early Middle Ages hoard that contains 200 artifacts, including a pendant that ...

Subduction zones, where one tectonic plate dives underneath another, drive the world's most devastating earthquakes and ...

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

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

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

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

The Zanj, enslaved people largely from Africa, rebelled at the same time they were ordered to build a massive system of ...

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

NASA's Chandra X-ray Observatory has captured a striking image of a distant quasar from the "cosmic noon," including a giant ...

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