Heh, I did notice. In my more insensitive moments, I've sometimes wondered if culling (purely in the interest of human survival as a species) would ever be necessary and under what conditions, or even if the human race as it is now would benefit from culls. For example, if antibiotic resistant syphilis spreads and mutates into to something much worse than it already is. I really, really hope that nothing like that ever happens. As for systems biology, both my family and my best-childhood friend's family have a whole lot of biologists and I sometimes think I might have been more interested in bio as a subject if that hadn't been the case. Of course, I wish I had the time to learn a great deal more about biology now, but somehow I don't really see it happening. Still, systems biology looks pretty interesting . . .