Feature

Navy Finds Jets Can Dig Holes in Arctic

Radiation-Killed Animals Are Harmless as Food

New Machines and Gadgets

Front Matter

5,000-Year-Old Pottery

Quieting Drugs Increase Effect of Sleeping Drugs

[Photograph]: Solar-Powered Telephone Equipment

Plane “Snaking” Can Be Caused by Air Turbulence

Radar Tornado Warning

Susceptible Ears Selected

Tools of Ancient People Found in Mexican Desert

[Photograph]: Fabric Windmill