Feature

Scientists Like Their Jokes

[Photograph]: Moth’s Message-Detectors

Baby’s Smile Not Instinctive Response to Human Voice

Thyroid Slows Metabolism When Temperature Is Low

Forests Store Sun’s Energy Faster than Coal Is Mined

First Glances at New Books

Front Matter

Professor Albert Einstein Announces a New Theory

New “Butterfly” Lamp Reflectors Stop Glare

Bill Provides $1,000,000 for Research in Agriculture

England Develops High-Speed Radio Operated Robot Plane

Leprosy, Man’s Ancient Foe, Fought with New Weapons