Feature

Swelling Marble Makes Trouble in Quarries

Cavemen’s Idea of Magic Shown by Paintings

X-Rays Can Speed up and Reverse Evolution

Florida Noddy Terns Change Nesting Habits

In Science Fields

Invisible Germs Should Not Stop Disease Fight

Science Explains Hang-over after Alcoholic Debauch

First Glances at New Books

Front Matter

Low Resistance in Cold Intrigues Engineers

Two Weeks’ Delay Precedes X-Ray Sterility in Mice

New Chemical Used to Fight Fungous Diseases