Advanced alien civilizations could probably already tell that there's intelligent life on Earth, thanks to our cell phone towers.
If intelligent aliens are searching for other advanced lifeforms in the galaxy, our cell phone towers could be the beacons that give Earthlings away.
"The Earth is already anomalously bright in the radio part of the spectrum; if the trend continues, we could become readily detectable by any advanced civilization with the right technology," Mike Garrett , the director of Jodrell Bank Centre for Astrophysics at The University of Manchester, said in a statement .
Garrett led the new study, published February in the Monthly Notices of the Royal Astronomical Society . The researchers used crowd-sourced data to simulate the leakage of radio signals from cell phone towers and to determine how difficult these signals would be to detect from other planets.
The signals would so far only be detectable to aliens with more sensitive instruments than those that exist on Earth, the team added. But as the signals get louder, farther-flung or less technologically savvy aliens will be more likely to detect them. – 9 strange, scientific excuses for why humans haven't found aliens yet
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