Penelope A. Lewis is a neuroscientist at the University of Manchester, where she runs the Sleep and Memory Lab. She is the author of The Secret World of Sleep. She has also written for a number of popular science publications, including New Scientist and was interviewed on NPR's "Fresh Air." Her research has been featured on the BBC, and she's received funding from top institutes, including the Wellcome Trust and Unilever. She lives in Manchester, United Kingdom.