Stephen Hawking joins futuristic bid to explore outer space

Harvard physicist Avi Loeb, left, listens as former NASA astronaut Dr. Mae C. Jemison, speaks during a press conference where scientists announced a new breakthrough initiative focusing on space exploration and the search for life in the universe, Tuesday April 12, 2016, at One World Observatory in New York. The $100 million project is aimed at establishing the feasibility of sending a swarm of tiny spacecraft, each weighing far less than an ounce, to the Alpha Centauri star system. (AP Photo/Bebeto Matthews)