This man has done so much for our understanding of the way newborns develop, what their needs are--and how to meet them without losing our minds! He brought the term 'the fourth trimester' into the mainstream and his ideas on the famous '5 S's' are to thank for the resurgence in swaddling babies, white noise machines and more. And now he's taken it to the next level with a smart bassinet, the Snoo, that claims to help babies and their parents get more sleep. I loved chatting to Dr Karp and could have gone on for hours if only we had the time. I hope you find his work as fascinating as I do.