they may serve patients dying on transplant list. john: 18 people a day mostly waiting for kidneys? >> that is exactly right. john: wake forest, where you wouldn't to school, researchers figured out how to print new skin cells on to burn wounds using 3d printers. what skirts out instead of ink are different kind of skin sells. they only need a patch much skin one 10th the size of burn to print cells. >> before that they needed skin grafts and would requireskin is harvested from multiple areas of your body. then you have multiple wound c that could have infection. plastic surgery and burn type medicine will really leap forward. >> people are thrilled about. that then you get squeamish when i point out that science will also soon allow us to design babies. it will happen. parents will select genes to increase the odds that their