Feature

Pollutant Waits to Smite Salmon at Sea

Computers

Back Matter

Seattle’s Soft Spot Boosts Power of Quakes

Physics

Ready, Aim, Squirt

Fossil May Expose Humanity’s Hybrid Roots

Land Mines May Set off Little Buzzers

Spider Solidarity Forever

Edible Compound Mimics Insulin

Front Matter

Parasites Make Frogs Grow Extra Legs