Feature

New Machines and Gadgets

Medium Tank Foils Shells

In Science Fields

Rule to Beat Heat: Do Not Talk about It

Timing Important in Child’s Personality

Bees Give Clue to Building Material

Do’s and Dont’s for Polio

Smallest Known Star

Radiation Impairs Fertility

Survival Swimming Taught

[Photograph]: One Year’s Offspring

New Growth Vitamin Discovered in Liver