> it doesn't cause you to think or learn Actually, centrifugal force is one of a number of topics on which my (mostly very good, thanks IB!) high school teache

> it doesn't cause you to think or learn Actually, centrifugal force is one of a number of topics on which my (mostly very good, thanks IB!) high school teachers told me something that was technically true or close to true (my teacher may have used the technically-correct word "fictitious") but not really very illuminating without a lot of explanation/background. There was no wikipedia then, and animated GIFs still seemed like a really good idea, so we (or at least I) just stayed slightly confused. All of which is to say, this comic (though old now) did prompt me to learn something. http://en.wikipedia.org/wiki/Centrifugal_force http://en.wikipedia.org/wiki/Centrifugal_force > I've seen better XKCDs I think this one is my favorite. While we're both commenting on an allegedly superfluous link, care to link to some you prefer? ---------- Just thinking: When I was a kid, there was no wikipedia. If you wanted to know about something, you had to wait for your parents to drive you to the library and hope they had a relevant, understandable, authoritative book (good luck). Now in my 20s, I can get at least a foothold in almost any imaginable topic--only a couple clicks away. What generation has seen something like that happen?