Stephen Johnson
Stephen Johnson
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Less-advanced alien civilizations may be nearby — but we're not looking for them

Less-advanced alien civilizations may be nearby — but we're not looking for them

Key Takeaways How will humans discover the existence of extraterrestrial civilizations?Unless aliens decide to visit Earth, the most likely answer is by scanning the skies for “technosignatures,” which are observational evidence of technological or industrial activity in the Universe.In a recent published in the journal Acta Astronautica, a team of NASA-funded researchers outlined some of the most promising ways scientists and space agencies could search for technosignatures. The paper included a somewhat surprising proposition: Humanity’s “first contact” with aliens is likely to be with a...

March 25, 2021
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