SETI – Search for Extra-Terrestrial intelligence – Explainstuff Fact of the day.

SETI, or the Search for Extra-Terrestrial Intelligence, is a project which aims to detect extraterrestrial intelligent life. SETI primarily uses radio telescopes to search for extraterrestrial signals, although optical telescopes and other methods have been proposed. Any discovery of intelligent alien life by SETI would have profound implications for humanity’s future.