Feature

How Plant Chemical Works Is Still a Mystery

Smoking Habits Studied

Winter Rye Flowers without Cold Spell

Psychiatrist Interprets Second Thoughts

Soviet Lunar Rocket Aimed to Hit Moon

Urge Oceanographic Aid

Fido’s Sniffles May Be Due to the Hay Fever Season

Front Matter

Guppy-like Fish Produce Only Female Offspring

Radioactivity Found High off Antarctic Continent

Mushrooms Aid Mental Ills

Space Fuel Economized