In truth, galactic cosmic rays (GCR) don’t bestow otherworldly abilities. Their gift is an increased risk of cancer. While this isn’t a concern within Earth’s magnetosphere, which deflects radiation, astronauts on a mission to Mars could hit NASA’s cumulative, career-long radiation limit in as few as 150 days. It could take up to 260 days to reach the Red Planet, let alone return. According to Kerry Lee, operations lead of NASA’s Space Radiation Analysis Group, there’s no easy solution to this problem. Adding multiple layers of armorlike passive shielding might work, but it would make a spacecraft too massive to launch.