Forty years ago today, man came home from the moon for the last time. Since then we've stayed away. Forty years is a long time - almost two generations.
When I was a kid I thought exploring other worlds was a normal thing to do, and I was disappointed to learn that it isn't. I am still disappointed.
 However, we have since stopped calling a bunch of men who represent humanity "man", which has been regarded as tremendous progress, a bit like calling actresses actors. Now we call "man" humanity, and in compensation, women have been renamed "bitches". Our language is going somewhere (albeit in a handbasket) even if the actual speakers are not.