How can ppl live without sleeping

Really?? Edison only slept 4hours a day?/ I didnt know that. Well, maybe he's just making an excuse or somehting. His brain is alwyas active thinking of the next greatest invention that it cant afford to sleep, otehrwise the idea would be lost in his sleep. So maybe he only sleeps 4 hours a day just to satisfy his body because all of our bodies need rest to fuction normally. Without at least a few hours of sleep, he wont be able to build all of his inventions right? Its like when your working on something that you're really working hard on and thinking about and cant rest until you've got it and so the mind is so preoccupied that it doesnt anymore recognize that the body is already fatigued and needs its rest. An example would be a videogamer. He really wants to get to the next level if its the last thing he does. He doesnt know the time or what day is it and all he thinks about is how is he going to get to the next level. A full 48hours pass and thats the only time he got to the next level so thats the only time he got to sleep. Well, its just a thought. Maybe all this thinking mgiht lead me to not get any sleep tonight.^_^ Have a nice day!