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By MIT News Office
November 7, 2018
![[article image]](https://cacm.acm.org/system/assets/0003/3121/11718.mit.news.office.alien_beacon.large.jpg?1541606076&1541606075 "Alien beacon"){kind=tracking}
If extraterrestrial intelligence exists somewhere in our galaxy, a new MIT 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 MIT News Office
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