Elon Musk and Jeff Bezos are bitter rivals in the commercial space race, but they agree on one thing: Settling space is an existential imperative. Space is the place. The final frontier. It is our human destiny to transcend our home world and expand our civilization to extraterrestrial vistas. This belief has been mainstream for decades, but its rise has been positively meteoric in this new gilded age of astropreneurs. But as visions of giant orbital stations and Martian cities dance in our heads, a case against human space colonization has found its footing in a number of recent books, from doubts about the practical feasibility of off-Earth communities, to realism about the harsh environment of space and the enormous tax it would exact on the human body. Read the full story. —Becky Ferreira This story is from our new print edition, which is all about the future of security. Subscribe here to catch future copies when they land. This American nuclear company could help India’s thorium dream For just the second time in nearly two decades, the United States has granted an export license to an American company planning to sell nuclear technology to India, MIT Technology Review has learned. The decision to greenlight Clean Core Thorium Energy’s license is a major step toward closer cooperation between the two countries on atomic energy and marks a milestone in the development of thorium as an alternative to uranium for fueling nuclear reactors. Read more about why it’s such a big deal. —Alexander C. Kaufman