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News From the Search for Extraterrestrial Life I

Super-Earths that might have life, choosing life forms to take to Mars, and self-replicating robots…

A roundup from popular science news sources: ★ Are any super-Earths habitable? The largest single class of exoplanets discovered are super-Earths — bigger than Earth but smaller than Neptune, of which there are 1,577 confirmed discoveries. Some lie within the habitable zones — at least in principle — of their stars. Stony Brook astrophysicist Paul Sutter ponders the factors that go into determining how many of them are actually habitable, concluding, Perhaps the best candidate for a habitable super-Earth is LHS 1140b, which orbits a red dwarf star about 49 light-years from Earth. It’s about 60% wider than our planet but 6.48 times as massive. It orbits extremely close to its parent star — its orbital period is just 25 Read More ›