One of my coworkers just said a pretty profound thing.  We were talking about how the Cassini spacecraft used nuclear power, and people at the time were scared of the prospect of a nuclear anything flying over their heads.  Even in the event of a disaster, the amount of radioactive material spread out over the earth's surface would've been indistinguishable from other naturally-occurring radioactive sources.  In other words, it was a non-issue.  I said, "People are pretty dumb."  I corrected myself and said, "But don't be afraid to ask the question."  He responded with, "And don't be afraid to accept the answer." #science