An artist renders what an exoplanet might look like.  Researchers studied Wolf 1061, a star just 14 light years away that might have a planet that could sustain life.

Aliens

E.T., Ridley-terrorizing xenomorphs, and oblong-eyed anal probers have long been part of popular culture, but aliens aren't just a fictional concern any longer. Recent discoveries of hundreds of exoplanets within the so-called "Goldilocks Zone" of habitability have challenged the idea that we're along in the universe. SETI researchers are looking to prove that isn't the case.