Kathryn Denning is an associate professor of anthropology at York University  in Toronto, Canada, where she teaches a course called “Anticipating the Alien.” Her focus is on what it means to be human in the universe and she works with SETI on studying the way scientists search for aliens.

Florence Raulin Cerceau is a director at Messaging Extraterrestrial Intelligence and an associate professor at the National Museum of Natural History in Paris. She is a historian of astrobiology and of the search for intelligent alien life.

Seth Shostak is the senior astronomer at the SETI Institute in Mountain View, Calif. He is often the public face of SETI — and therefore the public face of the scientific search for intelligent life beyond our solar system. He is the author of Confessions of an Alien Hunter: A Scientist’s Search for Extraterrestrial Intelligence.