Avi Loeb is a Professor of Science at Harvard University and a bestselling author. He received a PhD in Physics from the Hebrew University of Jerusalem in Israel at age 24, led the first international project supported by the Strategic Defense Initiative, and was subsequently a long-term member of the Institute for Advanced Study at Princeton. Loeb has written 8 books, including most recently, Extraterrestrial, and about 800 papers on a wide range of topics, including black holes, the first stars, the search for extraterrestrial life and the future of the Universe.