Chris Impey on the New Space Race and Exoplanet Habitation

Astronomer Chris Impey, author of the new book “Worlds Without End: Exoplanets, Habitability, and the Future of Humanity” and a professor at the University of Arizona, discusses the vast possibilities of extraterrestrial human habitation, why imagination is an important form of scientific speculation, and why humans’ initial move to space will likely mirror the lawlessness of the Wild West.