WASHINGTON (AP) — Maryland Sen. Chris Van Hollen was flying home from El Salvador on Friday after meeting with Kilmar Abrego ...

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

A team of astronomers claims to have sniffed out a “biosignature” in the atmosphere of a distant planet called K2-18b. But ...

Tutolo led a new study of rock samples collected by the Curiosity rover that might have answered this question. The mystery ...

Researchers have detected in an alien planet’s atmosphere the chemical fingerprints of gases that on Earth are produced only by biological processes ...

Further studies are needed to determine whether K2-18b, which orbits a star 120 light-years away, is inhabited, or even ...

In part of Jezero Crater known as the Shenandoah formation, two generations of calcium sulfate minerals formed beneath the ...

Lingering Brightness Provides Evidence for How the Planet Met Its Demise Each year, scientists from around the world compete ...

Mars might be known as the red planet due to all of the iron oxide in its soil, but its skies are a decidedly different story ...

Already having their hands full with an unbalanced RB21, Helmut Marko says compounding it with botched pit stops was "not ...