TED & Beautyrest | The way we sleep is constantly evolving -- from the first raised beds in ancient Egypt to communal sleeping as a way to keep warm during the Industrial Revolution to separate beds for married couples in Victorian England. Now that we've begun to study sleep as a science, we're starting to understand just how important a good night's sleep can be to our health and happiness. Created by the TED Ideas Studio, the branded content arm of TED Partnerships. To learn more, visit us at tedpartnerships.com. #sleep #innovation