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Science  19 Feb 1999:
Vol. 283, Issue 5405, pp. 1079
DOI: 10.1126/science.283.5405.1079b

Warm spell check. If you want to know why scientists think 1998 was the hottest year in 6 centuries, visit this new Web primer on paleoclimate. The site discusses how data from tree rings, ice cores, corals, and sediments reveal climate trends over millennia and includes links to key papers.

Belles lettres. Leaf through the scientific notebooks of Alexander Graham Bell at a new Library of Congress online archive of 1400 of the inventor's family papers. Included are aeronautical sketches, notes on deaf education, and Bell's lab jottings on how he tested the first telephone in 1876, shouting the famous words: “Mr. Watson—come here—I want to see you.”

Controlled chaos. Curious about the kind of math driving those cool fractal images? This Web primer on chaos and nonlinear dynamics explains it all, from “strange attractors” to Mandelbrot sets. The appendices are loaded with links to applied chaos groups, fractals, and software.

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