Links:

NASA: a pretty easy to read and understand explanation of what happens to the human body when subjected to a vacuum. I wish someone would make a golf course in a vacuum. Then you could create remote-controlled golfing robots, and apply pure physics to the problem. I'd watch that on TV!

Wired article: "Scientists at the International Botanical Congress in St. Louis said humans had abused the earth so effectively that extinction rates are close to that of previous mass extinctions in geologic history."