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An MIT scientist asserts a laser area sign obvious as much as 20,000 light years away is feasible– basically serving as a patio light for extraterrestrial life. James Clark'' s research posits that focusing a one- to two-megawatt laser via a 30- t.
Original source: https://www.engadget.com/2018/11/05/laser-beacon-space-aliens-exoplanets-mit-research/
