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TechReaching for Rays
Harnessing the sun's rays cheaply and efficiently could address the planet's energy needs.
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Health & MedicineDangerous History
The genome of the TB bacterium has small but significant pockets of diversity, giving scientists new targets for preventing and treating the disease.
By Emily Sohn -
MathCovering New Ground with Polygons
Mathematicians can cover larger areas than they'd realized using polygons with fixed diameters.
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HumansLetters from the May 26, 2007, issue of Science News
It’s cold out there I couldn’t help noticing the last sentence of “World’s climate map gets an update” (SN: 3/24/07, p.