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Back Matter

Front Matter

Unstable Proton

Erroneous Elephants

Controlling Caries

AAAS on Energy: Toward a Consensus of Urgency

Whale Talk: Song and Dialect

‘Safe’ Sedatives and Pregnancy

Now — Asteroid-Caused Extinctions

Chemical Analogies between the Stars

Technology Swaps with Soviets Stop

‘Test-Tube’ Clinic Approved