We've learned about colonoscopies, various blood pressure medications. We've learned about how to deal with dogs, rednecks and golfers. We've learned about what it takes to get ready to climb really large mountains on a bike and what it feels like to succeed. We've learned a little about carbon fiber and the social interactions that go with different riders opinions about saddles, pedals, mirrors. We've learned a little about raising kids, dealing with families, crossing the country with a bike and a tent. Then there's the physics of bikes being faster merely because of their color.
Oh, did I mention that we learned how to deal with golfers!