Feature

  1. Making the Deuterium Fit the Big-Bang Theory

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  2. Test-Tube Babies in the Makings

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  3. Soviets and Americans Tackle Heart Disease

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  4. NAS Calls ’75 Standards Technologically Feasible

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  5. Why Stars Twinkle

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  6. Oily Seas and Plastic Waters of the Atlantic

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  7. The Asteroid Belt: Not as Much Material as Expected

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  8. Causes of Aggression

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  9. Environment Message: A Middle Path

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  10. The Chances of Contacting Extraterrestrial Civilizations Seem Poor

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  11. Front Matter

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  12. Films of the Week

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