Feature

Two Mental Diseases Really Five, Statistical Study Shows

Nature Ramblings: Hospitality to ‘Hoppers

Sleeping Sickness Outbreak Greatest in History

Front Matter

Spot Larger than Earth Breaks out on Saturn

Moving to Better Lands Seen as Resettling of America

Heavy Water Prevents Seeds from Sprouting

New Determination Sets Greatest Solar Heat

Frogs Reared in Dye Become Albinos

Iron Blade Found Millenium Older than Iron Age

Map Shows Sixty Dialects of Mexico

Little Tragedies of Childhood