Who Speaks for Earth? The Controversy over Interstellar Messaging

Should we beam messages into deep space, announcing our presence to any extraterrestrial civilizations that might be out there? Or, should we just listen? Since the beginnings of the modern Search for Extraterrestrial Intelligence (SETI), radio astronomers have, for the most part, followed the listening strategy. In 1999, that consensus was shattered. Without consulting with […]