Feature

Brain Region Takes a Hack at Navigation

Front Matter

Transgenic Plants Provoke Petition

Computer Chips Take a Leap Forward

Satellites Hint Sun Is Growing Stronger

Mice Smoke out Key Emphysema Enzyme

A Gamma-Ray Burst’s Enduring Fireball

Narcotics Use and Immunosuppression

Ancient Mound Builders Get Cultured

Biology

Chemistry

Dry Sand, Wet Sand