It is probably the discovery of additional earth-sized extrasolar planets in TRAPPIST-1's Goldilocks Zone[0].<p>It would be <i>really</i> cool though, if at least one of those planets turns out to have an oxygen atmosphere...<p>The inclusion of Sarah Seager[1] an exoplanet scientist working on the problem of identifying the signatures of life in exoplanet atmospheres[2], is suggestive.<p>[0] <a href="http://www.trappist.one/" rel="nofollow">http://www.trappist.one/</a><p>[1] <a href="http://www.saraseager.com/" rel="nofollow">http://www.saraseager.com/</a><p>[2] <a href="http://www.space.com/28756-alien-life-search-exoplanet-atmospheres.html" rel="nofollow">http://www.space.com/28756-alien-life-search-exoplanet-atmos...</a>