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

Even though it is one of the most abundant elements (predominately in the form of nitrogen gas (N 2) in the Earth’s atmosphere), plants can only utilize reduced forms of this element.

Of all the asteroids that become meteoroids by striking Earth's surface, only 4% contain abundant carbon. But scientists know carbon-rich asteroids are commonplace in the cosmos—they just don't often ...

A giant, gaping hole that opened up in the Sun's atmosphere has been identified as the source of a surprising abundance of a ...