Feature

Left Brain Reigns over Sign Language

Clues to Life’s Cellular Origins

Back Matter

New Look for an Old Dinosaur: Armor Plates All in a Row

Possible Marker for Dementia Disease

The Quake Gap: Waiting for Magnitude 7

Why the Southeast Is Sweltering

Technology

Sequencing the Genome: Crusade Called Off

Biomedicine

Commentary: A Thank-You to Our Subscribers

Signs of How Lead Toxicity Begins