Slushy hailstones of ammonia and water were part of a bizarre theory to explain the planet's poorly mixed atmosphere. These mushballs seem to be real, say UC Berkeley scientists.

Astronomers detect chemicals linked to life on distant exoplanet K2-18b, but say more research is needed to confirm the discovery.

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

Astronomers have made a detection suggesting biosignatures, or signs of biological activity, on an exoplanet located 124 ...

"Given everything we know about this planet, a Hycean world with an ocean that is teeming with life is the scenario that best ...

A 4.4-billion-year-old zircon crystal discovered in Australia may be the oldest surviving piece of Earth.