Alien life? Why the possibility of exoplanet LHS 1140b emitting helium gas is so exciting.
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Explore the most promising habitable exoplanets discovered by NASA's Kepler and TESS missions, and which worlds are most likely to harbor extraterrestrial life.
Do aliens exist? The honest answer from astronomy, biology and the search so far: how many planets there are, what biosignature claims have held up, why nobody has answered SETI, and what would count as proof.
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