Astronomy Picture of the Day: 2020 March 1 - A Hole in Mars

submitted by EndlessSunflowers from apod.nasa.gov

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[–]JasonCarswell 1 insightful - 2 fun1 insightful - 1 fun2 insightful - 2 fun -  (0 children)

Not only are those pits worthy of exploration for water (past, present, future, and/or ice, liquid, vapour) but they're also great to protect against radiation!

Intrasolar space travelers need to be cave men again because you can't just bring all the heavy radiation protection - or even build dolmens or rock huts that would be thick enough.

Also, if you found a source of water - you might be able to fill bags of water in walls as a radiation absorption barrier.