there is a chance you are just what s called a short sleeper. someone who doesn t need much sleep. no such luck for me. it is less than 1% chance. but the other 99% of us all wish we could burn the candle at both ends. abc s mara schiavocampo explains in our series, sleepless in america. reporter: like so many of us, jen schwanner is busy. she works as a curt reporter, cooks for her daughter s softball team and fosters babies for the state of florida. but unlike most of us, she does it all on less than four hours of sleep. and she says, she s never tired. i feel like i m living my life rather than sleeping it. her father, pat, is the same way. he can get by on as little as one hour of sleep a day. i m not superman. not an x-man. just, i feel i m kind of lucky. reporter: it s not luck. it s genetics. researchers call them short sleepers and say it is because