Feature

Nature Ramblings: When Is a Shellfish?

First Glances at New Books

Front Matter

Rats Lose Cancer Tendency, Rabbits Gain Extra Ribs

Rheumatism Can Be Cured by Early, Adequate Treatment

Artificial Fertilization Used on Gnat-Sized Insects

[Photograph]: Columnar Crystals

Movies Have 3 Dimensions in Sound as Well as Sight

[Photograph]: Stone Age Strife in Spain

Two-Way Electric Plow in Use in Soviet Russia

New Books on Science

[Photograph]: Have You Seen Her?