Today I'm looking forward to a series of talks in the morning that review the last 50 years of advances in Quaternary studies. I find that kind of session especially valuable, because my knowledge of geology started almost that long ago! You never know just what old notions and outdated preconceptions you might have until a panel of leading experts can enlighten you in one big multipart lecture. A noontime address will feature America's most politically prominent geologist-politician, Colorado governor (and former brewer) John Hickenlooper. And an afternoon session will continue exploring new knowledge about the Grand Canyon puzzle, this time looking upstream.