The SETI Institute uses a worldwide network of large radio telescopes to seek signals that might hold patterns indicating intelligent communication. But the problem with this particular method to search for extraterrestrial intelligence is that the signal could be blocked. Electromagnetic waves, whether visible light or radio, could encounter planets, stars, or other cosmic objects that block the waves from reaching our instruments on Earth.
The solution could be to add a new way to search the skies for aliens, one scientist proposes. Harvard University’s astrophysicist, Avi Loeb, who is joining New York-based physics think tank Applied Physics, along with astrophysicist Shaun D. B. Fell of Heidelberg University in Germany, thinks there’s a novel way to find potential alien technosignatures.