For over six decades, the Search for Extraterrestrial Intelligence (SETI) has been tirelessly scanning the cosmos for signs ...

Stellar plasma can smear alien radio signals before they escape their star system, making them harder for astronomers to detect.

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: FX / Hulu "In space," some marketing genius once said, "no one can hear you scream".

For decades, scientists have been actively searching for signs of extraterrestrial life. Fromradio waves to laser flashes and infrared heat signatures, the hunt for alien technosignatures has ...