The closest potentially Earth-like exoplanet probably cant host life

Only a few years ago, astronomers heralded the discovery of a rocky world circling the sun's closest space neighbor, Proxima Centauri. 

The star, just four light-years away, is known as a red dwarf, or M-type, and is quite different from Earth's own. Although the exoplanet, Proxima b, orbits extremely close — a year there is only 11 Earth-days — its star's relatively smaller size and lower temperature could mean this world has the right conditions for liquid water to pool on its surface.