Caleb Scharf is the award-winning author of The Copernicus Complex and Gravity’s Engines and the director of the Columbia Astrobiology Center. He has written for The New Yorker, The New York Times, Scientific American, Nautilus, and Nature, among other publications. He lives in New York City.

Ron Miller is an award-winning illustrator and author whose work has appeared in National Geographic, Scientific American, the bestselling app Journey to the Exoplanets, and editions of 20,000 Leagues Under the Sea, Journey to the Center of the Earth, and many other books. He served as art director for the National Air and Space Museum’s Albert Einstein Planetarium. He lives in Virginia.