Feature

Power Lines

Life Imitates Art, Baffles Computer

Let’s Repeat: Mutation Gums up Brain Cells

The Art of Scientific Photography

Northern Exposure?

Cultural Mix and Self-Enhancement

Small Comet Theory Faces Barrage from Foes

Even Fraternal Twins May Share Cancer Risk

Science News of the Year

Teens Show Sex-Linked Pull to Cigarettes

Front Matter

Nations Draft Kyoto Climate Treaty