http://www.newsweek.com/nasa-james-webb-trappist-1-exoplanet-study-alien-life-1731379

Scientists will be able to work out whether a group of nearby exoplanets are habitable or not by studying their potential atmospheres, a NASA expert has said.

The question of whether the TRAPPIST-1 exoplanets have atmospheres is "the most important" scientific investigation that anyone involved in the search for alien life is going to be doing for potentially a decade, NASA astrobiologist Shawn Domagal-Goldman told Newsweek.