Extraterrestrial: The First Sign of Intelligent Life Beyond Earth

New York Times Bestseller | Wall Street Journal Bestseller | Publishers Weekly Bestseller | Publishers Marketplace 2020 Buzz Book | Amazon Best Book of the Year | Longlisted for the 2022 PEN/E.O. Wilson Literary Science Writing Award

Harvard’s top astronomer lays out his controversial theory that our solar system was recently visited by advanced alien technology from a distant star.

“Provocative and thrilling ... Loeb asks us to think big and to expect the unexpected.”—Alan Lightman, New York...