Feature

Front Matter

Some Cigarette Makers Manipulate Nicotine

Cell ‘Caves’ Harbor Clues to Diseases

UV Damage: Some Surprises under the Sun

Behavior

Bicarb Spares Old Bones

Back Matter

Pumping Iron Aids Seniors

Books

Rewards Resurface as Creativity Enhancers

Gap in a Stellar Disk Hints at Planet

Large-Scale AIDS Vaccine Test Delayed