The June issue of Discover magazine has an in-depth article on some of the health risks of riding coasters, how the human body can withstand G-forces and for how long, that sort of thing. It talks a lot about Millennium Force, and how the coaster can go so high/fast without greater negative effects on the body - how the track is designed with the overbanked turns. Quite interesting, especially the statistics of how very unlikely it is to get hurt/killed on a coaster! I highly recommend it! (Starts on p. 26-7) There are a couple of pics of MF too, but nothing we haven't seen before.
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Po!nt of View: A different look at Roller Coasters.
http://www.crosswinds.net/~justmayntz/thrills/index.html