Dimethyl sulfide is cool—and a potential biosignature—but scientists are urging caution before we declare a plankton party some 120 light-years away.

New JWST data strengthens earlier hints that K2-18b, a possible water world 120 light-years away, could host the chemical byproducts of life.

The longest organic molecules yet found on Mars are very similar to those produced by life on Earth.

In a theoretical study, researchers explored how a twin Earth with human-like life and technology might detect our technosignatures.

It's difficult to detect microscopic lifeforms, even with advanced techniques—now there might be a solution.

The discovery is a capstone achievement for NASA, which went to great lengths to secure and deliver asteroid samples from asteroid Bennu in 2020.