Kevin R. Grazier, Ph.D. was a research scientist for fifteen years at NASA's Jet Propulsion Laboratory on the Cassini/Huygens Mission to Saturn and Titan. Still an active researcher, he performs large-scale computer simulations of early Solar System evolution. Grazier served as the science advisor for the film Gravity, and on the television series Eureka, Defiance, Ascension and the Peabody-Award-winning Battlestar Galactica.

Stephen Cass is an Irish science and technology journalist based in New York City. He has been an editor at Discover magazine and MIT Technology Review and has written for outlets such as Popular Science and Nautilus. He has also edited several science fiction anthologies. He is currently geeking it to the max as a senior editor at IEEE Spectrum.