In the category of crap I didn’t know, it appears that future explorations of the solar system might be in danger. It seems we are running out of plutonium-238, the substance used to power most of our extra planetary craft. We have enough for maybe one more mission, then after that nada. You would think this would be one of those issues that someone would have planned for so that there would be a steady supply, but I guess not.
Is it me, or do we really go out of our way to make our lives harder than they have to be?