Possible Earth twin discovered just 40 light-years away. New findings from the James Webb Space Telescope suggest that the exoplanet TRAPPIST-1e—one of seven rocky worlds orbiting a small red dwarf star—may have a thin, nitrogen-rich atmosphere similar to Earth’s. If confirmed, this would mark the closest match to an “Earth twin” ever detected, with conditions that could support liquid water and, possibly, life. The data, gathered from four transits of TRAPPIST-1e, show hints of a stable secondary atmosphere—not like the thick carbon dioxide envelopes of Venus or Mars, but something more balanced and potentially habitable. Scientists caution that it’s still early, but upcoming Webb observations could reveal if this nearby world truly mirrors our own.