Feature

Streamlined Periscopes to Go on Navy Submarines

Protect from Drowning

Atomic Heart Found 15% Smaller than Thought

Early Days Recreated

Books of the Week

Recipe for Potato Salad Served Ike

Girls Go to School Longer than Boys

Man Was Hunter 15,000 Years Ago in America

No Antibiotics for Colds

Front Matter

The Older the Father More Likely Baby Is Girl

New Machines and Gadgets