Assuming I live to be as old as some of my relatives did, am I going to be able to look back on my life and marvel at how much things have changed since I was a kid? I mean, my grandparents and grand-uncle (who died at 105) got to see a LOT of really meaningful change. Somehow, I doubt I'm going to get to see anything so meaningful as the transition form man not even having powered flight to being on the moon. Right now, it seems like the best I'm going to be able to point to is nifty consumer gadgets. In fact, on the trajectory we're on, I'll be able to say "I remember moon mission" as a kid but have nothing even remotely as awe-inspiring in my adulthood. Pretty sad, actually.