Computer models indicate that many diseases will surge as the earth's atmosphere heats up. Signs of the predicted troubles have begun to appear. Paul R. Epstein discusses that this prospect is deeply troubling, because infectious illness is a genie that can be very hard to put back into its bottle. Hear about mosquitoes, unhealthy water, and possible solutions in the lead article of this month's Scientific American. Thomas P. Ray ponders on "Fountains of Youth: Early Days in the Life of a Star." Peering into the genesis of stars and planets, the Hubble Space Telescope and other instruments have found that it is a frenetic process, violently expelling vast jets of material. In a more down-to-earth article, Irwin Goldstein raises the issue of "Male Sexual Circuitry," explaining that control of what goes on below the belt starts inside men's heads. Plus, Glenn Zorpette discusses flash picture-taking with "Focusing in a Flash," and James Burke connects the dots between theology, calculus, social satire, locomotives, Napoleon and economics in "The Grand Plan."
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