But traveling to Mars is more difficult. It is 35 million miles away! Franklun Chang Diaz, a former NASA scientist, is developing a rocket that will send a shuttle into space at the speed of 55 kilometers per second. The trip from the Earth to Mars will be reduced from 6 to 8 months to 39 day. NASA, the U.S. space agency, announced that someday people may even live on Mars. But befor that happens, many question will have to be answered