Harvard physicist Dr. Avi Loeb responded to critics of his theories of possible alien life, saying they were not curious enough to challenge their own preconceptions.
Harvard professor Avi Loeb says he found interstellar objects in the deep sea Others are skeptical salon.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from salon.com Daily Mail and Mail on Sunday newspapers.