Harvard astrophysicist Avi Loeb speculates on the implications of 3I/ATLAS, an interstellar comet that could potentially be an alien spacecraft. He emphasizes the need for humanity to prepare for the possibility of extraterrestrial contact, whether it be benign or hostile. Recent surges in searches for “planetary defense” suggest public interest in how we would respond to such visitors. Loeb advocates for establishing an alert system for interstellar objects and international cooperation to address existential threats from space.
