Janna Levin is the Claire Tow Professor of Physics and Astronomy at Barnard College of Columbia University. She is also the Chair and Founding Director of the Science Studios at Pioneer Works. A Guggenheim Fellow, Janna has contributed to an understanding of black holes, the cosmology of extra dimensions, and gravitational waves in the shape of spacetime. She is the presenter of the NOVA feature Black Hole Apocalypse, aired on PBS—the first female presenter for NOVA in 35 years. Her previous books include How the Universe Got Its Spots and a novel, A Madman Dreams of Turing Machines, which won the PEN/Bingham Prize. Her latest book, Black Hole Blues and Other Songs from Outer Space, is the inside story on the discovery of the century: the sound of spacetime ringing from the collision of two black holes over a billion years ago.