Feature

Math Discoveries Catch Kids Unawares

Unknown Plants under Our Noses

Plans Change for NEAR Visit to an Asteroid

Sand Piles Harden as Water Makes Links

Correction: Lava May Have Sculpted Martian Plains

Earth’s Temperature Shot Skyward in 1998

Front Matter

Year-2000 Chip Danger Looms Large

Biomedicine

Good and Bad News for Migrating Monarchs

Water Comes Clean with New Purity Test

Behavior