1. "There are two long runs I have to do from Elmhurst next time I'm there, because even though they go through similar areas seeing all the places I want to would probably make it close to 20 miles." And then I realized that one of them, the new eastern end of the Prairie Path at the Forest Park L terminal, isn't that much farther from my apartment than from my parents' house. About 7.5 miles from their house (according to mapmyrun.com), and probably just short of 9 from mine according to the street grid. One of the things I love about running and biking is that it fills in the gaps in my mind between places I know. And a lot of parts of the near-west suburbs and the west side of Chicago have yet to be really filled in (I've only biked west out of the city by three different roads: Washington, Lake, and 26th). I think I should do a Forest Park run from both sides.
2. But as much as I like doing this, I never would without having good maps and satellite images of... pretty much everywhere. I did set out in search of Heart of Chicago without a great idea of where it was, but that's practically in my back yard. I'm too risk averse to just set out west and hope. I live on Google Maps. It feels like cheating.
3. Wikipedia's description of the proof that the Cantor Set is uncountable is ridiculously intuitive. I think I've lost pretty much forgotten all my math terminology since I finished up with math classes pretty early in college, and I never even studied numerical topology. That is, I shouldn't have any advantages in understanding this over any of you guys. And not only do I understand that, but I have a better understanding of what numerical topology is, and what countability is, just from reading that one section. Kudos to whomever wrote it!