Until the End of Time

As a theoretical physicist at the University of Pennsylvania, Vijay Balasubramanian pursues research in two different fields: string theory and theoretical neuroscience. He is an expert in statistical inference and “Occam’s Razor”—the trade-off between simple and accurate mathematical models.

Janna Levin is a professor of physics and astronomy at Barnard College of Columbia University and the author of Black Hole Blues and Other Songs from Outer Space.

Lee Smolin is a theoretical physicist who has made important contributions to the search for quantum gravity. Smolin is a founding faculty member at Perimeter Institute for Theoretical Physics. His five books explore philosophical issues raised by contemporary physics and cosmology.