Avi Loeb is the Director of the Institute for Theory and Computation at Harvard working in astrophysics and cosmology.  According to TIME he is one of the 25 most influential people in space. Today he is here to talk with Lisa about how we've been searching in the wrong places for extraterrestrial life. For decades we have focused on things like radio signals when millions of objects pass by us every year. Avi believes some of this space debris could be artificial and may hold answers to our greatest questions.