U.S. team of researchers detected signs of two chemicals in the planet's atmosphere long considered to be "biosignatures" indicating extraterrestrial life.

The discovery was made on a massive exoplanet known as K2-18b that for years has captivated scientists searching for life outside of Earth.

The exoplanet K2-18b could harbor a massive ocean, but scientists will need to study the planet more to see if it’s really ...

Astronomers have detected molecules on exoplanet K2-18b that may have been produced by simple organisms, claiming it's the strongest evidence yet of life off Earth.

Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they remain cautious. Using data from the James Webb Space Telescope (JWST ...

Observations by the James Webb space telescope find possible biological activity on a giant planet 124 light-years from Earth ...

The James Webb Space Telescope spotted possible signatures for life in an exoplanet's atmosphere. Still, researchers caution it’s far too early to call the findings definitive ...

A chemical called dimethyl sulfide popped up in an analysis of exoplanet K2-18b’s atmosphere. On Earth, it’s only made by ...

Another option, as University of Cambridge astronomer Nikku Madhusudhan recently proposed, is that the planet is a "hycean world." That term means hydrogen-over-ocean, since astronomers predict ...

Another option, as University of Cambridge astronomer Nikku Madhusudhan recently proposed, is that the planet is a “hycean world”. That term means hydrogen-over-ocean, since astronomers ...

Another option, as University of Cambridge astronomer Nikku Madhusudhan recently proposed, is that the planet is a “hycean world.” That term means hydrogen-over-ocean, since astronomers ...