cells to grow tailored replacement. if you have a science question head for our website if we answer it on the show we'll send you a copy of our animated einstein d.v.d. which explains some of the great scientist groundbreaking theories. the most important thing is to never stop asking questions. how do people travel in the future. on conventional trains. and planes. one group of researchers and designers doesn't think so they think we'll all be taking the hyperloop and development has already begun.