In a recent commentary, published here on the pages of Scientific American, Jason Wright, professor of astronomy at The Pennsylvania State University, outlined a clear and persuasive argument for NASA to resume funding SETI – the search for extraterrestrial intelligence.

One of the most insightful points Jason makes is that there is no a priori reason to suppose that technosignatures (from intelligent life elsewhere in the universe) should be any less detectable than biosignatures (from any kind of life elsewhere in the universe). Indeed, I think indications of this fact go back quite a way. Take for example the famous, and famously elegant, experiment performed in December 1990 when the Galileo spacecraft made a gravity assist flyby of the Earth.
— Read on blogs.scientificamerican.com/life-unbounded/seti-the-next-generation/