Feature

Three-Fourths of Fallout Caused by Soviet Tests

Earth’s Core Reported Not to Be Pure Iron

Study Bird’s Courting

U. S.: Moscow Exhibit

Floods of past 30 Years Have Claimed 2,430 Lives

X-Rays Cause Sterility

Climate Affects Health

New Device Saves Cotton, Cuts Carding Costs

Supersonic Capsule Designed for Jet Pilots

Study Slime Molds

[Photograph]: Electrode for Heart Cell

Fatherless Potatoes Seen as New Aid to Breeders