Wolfram|Alpha. I was born on November 17, 1947. Yes, I know, that makes me an old man; especially by techno nerd standards. Be that as it may, I was curious about the new computational knowledge engine from Wolfram Research, Wolfram/Alpha. So, on a whim I typed: "What was the weather in St. Louis, Missouri, on November 17, 1947?" The computer hummed and whirred, and progress bars appeared across the screen, and, in a couple of minutes, this image appeared:
I never knew that I was born on a Monday, and that the weather was cloudy, and that the temperature was almost freezing. But, it explains a lot. The historical temperature and weather charts are a bit much for my non-scientific personage; however, it is nice to know that all that knowledge is out there, and that Professor Wolfram and his colleagues have the computing power to analyze it.