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Scientific and technological advances suggest that it might best be used not as a fuel but as a chemical raw material Many important properties of metals are now understood to result from a kind ...

You are currently logged out. Please sign in to download the issue PDF. The use of such an instrument as a “lie detector” raises two types of question: scientific ...

You are currently logged out. Please sign in to download the issue PDF. In the Mexican valley of Tehuacn bands of hunters became urban craftsmen In the course of ...

You are currently logged out. Please sign in to download the issue PDF. Astronomical Gains Made Public at the Recent Boston Meeting of the American Association for ...

You are currently logged out. Please sign in to download the issue PDF. If an American addresses a Latin from a distance of 20 inches, is he impolite? If an Arab ...

Observation of nature by Renaissance artists and craftsmen was a precursor of the new scientific outlook. This in turn accelerated technology, leading to the industrial revolution ...