I bet there's at least ONE human being on Earth who, when exposed to space radiation and zero gravity, will develop superhuman powers.
We've been doing it all wrong all these years. Instead of going to Mars, we should be creating this huge Death Star like space station without the death ray so at least 10,000 people can be in space at any one time and then we test everyone who volunteers to stay in that station for a few weeks to see if they get stronger instead of weaker. And no, there would be no artificial gravity on the station coz that would then defeat the whole purpose.