Much of NASA’s Van Allen Probe A is expected to burn up upon reentry into Earth’s atmosphere on Tuesday. But some of it won’t.

Looking for molecular evidence of life on other worlds is tricky, but a test based on the reactivity of carbon compounds ...

We may be missing alien radio signals because they have become smeared beyond the narrowband detectors that SETI utilizes, a new study suggests.

Chalk up another victory for “Conan the Bacterium”—a rugged germ that fresh research suggests could conquer the solar system.