The Small Planets
Asteroids have become notorious as celestial menaces but are best appreciated in a positive light, as surreal worlds bearing testimony to the origin of the planets
Volume 282, Issue 5
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Features
Coping with Crowding
Making Metallic Hydrogen
By re-creating extreme conditions like those in Jupiter's core, physicists have at long last turned hydrogen into a metal
Care for a Dying Continent
In Zimbabwe--where AIDS is prematurely killing a generation of adults--counselors and researchers struggle against social customs, viral resourcefulness and despair.
Avoiding a Data Crunch
Curiosity Rhymed the Cat
Alan Alda reports on readers' winning responses to his limerick challenge