Scientists have discovered a new way oxygen can form in carbon-dioxide-rich atmospheres of worlds beyond our own —- challenging assumptions about how we should search for life on other planets, and ...

Adenine is an undistinguished-looking chemical with a molecule made of two ordinary carbon-nitrogen rings. But to biochemists, it is one of the keys of life. It takes part in the formation of a long ...

Washington, D.C. — Dust samples collected by high-flying aircraft in the upper atmosphere have yielded an unexpectedly rich trove of relicts from the ancient cosmos, report scientists from the ...

Rocks in West Greenland resemble cake marbled with chocolate and vanilla. They’re now the oldest evidence of Earth’s magnetic field. Isua Supracrustal Belt rocks contain an alternating banded iron ...

Illustration of NASA's Curiosity rover which has been exploring Mars since 2012. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by ...