Meet Kepler-186f: First exoplanet found to be 'almost like Earth'

Scientists have found an Earth-sized world they've named Kepler-186f orbiting in a life-friendly zone around a distant star called Kepler-186.

The discovery, announced on Thursday, is the closest scientists have come so far to finding a true Earth twin. The star is located about 500 light years away in the constellation Cygnus, is smaller and redder than the sun.