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Sending Messages to Aliens: Could It Kill Us?

If an advanced alien civilization is out there, should we advertise our presence and hope they're friendly?

Published On 06/03/2016
10:18 PM EDT
When the aliens land, everything will be just fine. | Getty Images
Our imaginings of extraterrestrials have always been very positive. | Getty Images
When they arrive, they'll come in peace. | Getty Images