Years of mouse research lead to discovery of how autophagy keeps neural stem cells ready to replace damaged brain and nerve cells.

As we continue to celebrate International Dark Sky Week, we present this composite star trails image from photographer Sergio Garcia Rill.

Toward the end of its life, our own sun will go through a phase very much like the one pictured here.

Will rockets powered by fusion eventually make interplanetary travel commonplace?

International Dark Sky Week is happening right now (April 5-11) . To celebrate, enjoy these fantastic pics - they make us say WOW. And post your own.

Student researcher uses satellite imagery to calculate ice flow velocity in the coldest place on Earth.

Study authors say this is the first study to link greenhouse gas emissions directly to warmer temperature extremes in a single country, rather than on a global scale.

Significant storm system sweeping across U.S. will bring winter back to Northern Plains and Rocky Mountains. and severe weather in Central Plains and U.S. Southeast.

In the spirit of International Dark Sky Week, a shimmering panoramic of the Milky Way.

A new study suggests that the way carbon moves from within a planet to the surface plays a big role in the evolution of a planet's atmosphere. If Mars released much of its carbon as methane, for example, it might have been warm enough to support liquid water.