Off-Earth is an extension of her 2017 podcast, Making New Worlds, which asked ethical questions about space settlement. The book takes some of the same questions and expands on them.

Neil deGrasse Tyson brings journey through time and space to Earth in latest book "To Infinity and Beyond: A Journey of Cosmic Discovery" was released Sept. 12.

That question is at the center of a new book written by my guest. Mario Livio is co-author with Jack Szostak of Is Earth Exceptional? The Quest for Cosmic Life. Dr. Livio is an astrophysicist ...