What does human evolution reveal about the way we sleep鈥攁nd why do so many people struggle today? David R. Samson, associate professor of evolutionary anthropology at the University of Toronto, uncovers how our ancestors鈥� move from the safety of the forest canopy to more dangerous ground shaped the unique sleep patterns we follow today. Please join the Smithsonian Associates in welcoming David R. Samson, author of The Sleepless Ape.