In case you’re thinking about signing up for that Inspiration Mars trip, there’s a little something you should know…
Radiation is a substantial risk to humans once they’re beyond the protection of Earth’s magnetic field. There are lots of ideas for mitigating this, most of which involve some form of just rearranging the stuff they’d already have to bring with them. Food and water immediately come to mind, especially water. Since any water supplies on such a long-duration flight would have to continually recycled, we’d be talking about a fairly constant volume. But there is one other “value-added” radiation shield that would build up during the trip.
Can you think of what that might be? Anyone?
Hint: monkeys fling it.
The Chiles Files 
Ewwww. Just ewww.