In a monastery library on the Sinai Peninsula, a devotional handbook by the monk John Climacus sat quietly for centuries ...

A UT San Antonio-led international research team has identified chitin, the primary organic component of modern crab shells ...

Earth's surface is covered by more than a dozen tectonic plates, and in subduction zones around the world—including the ...

Decades of advances in satellite observation made it seem as though Arctic snow cover was growing, when in reality satellites ...

A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding ...

Some 66 million years ago, life on Earth had a pretty bad day. The infamous Chicxulub asteroid slammed into the planet. The ...