If extraterrestrial intelligence exists somewhere in our galaxy, a new study proposes that laser technology on Earth could, in principle, be fashioned into something of a planetary porch light -- a beacon strong enough to attract attention from as far as 20,000 light years away.
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2018/11/181105132859.htm
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2018/11/181105132859.htm
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