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President Trump has placed an indefinite suspension on research grant reviews and travel at the National Institutes of Health ...

You are currently logged out. Please sign in to download the issue PDF. The bottom off northern California is broken by a cliff a mile high and more than 1,000 miles ...

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 numbers that appear in tables of constants, lists of street addresses and similar ...

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 ...

You are currently logged out. Please sign in to download the issue PDF. Regions in the sun's corona appear to be as much as 1,000 times hotter than its surface. They ...