Feature

Earth’s Core Metallic Sponge, Suggests Fordham Seismologist

Man-MadeRadioactiveSodium Used to Treat Human Disease

Rats Wear out Teeth in Order to Stay Alive

Dust Bowl Grows while Floods Rage

Nature Ramblings: Stones into Bread

Airline Safety Problem Holds Focus of Attention

First Glances at New Books

Goes to Brazilian Tropics to Shock Electric Eels

Robot Mathematician Solves Nine Simultaneous Equations

Sunspots More Numerous; Radio Range Increases

New Food and Drug Bills Fail to Protect Public Fully

Weather Disasters Bred Wars in U. S. History