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  1. Health & Medicine

    Blood Relatives

    After decades of research, several companies are about to release the first line of artificial blood products.

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  2. 18919

    Your recent article on oxygen deprivation interested me greatly. As a jump pilot (hauling skydivers), I visit moderately high altitudes regularly. On a typical busy day, I may go to 14,000 feet 20 times. Granted that I don’t stay there very long, but I wonder if the harmful effects are cumulative. Peter Danes San Diego, […]

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  3. Health & Medicine

    Breathing on the Edge

    Researchers are exploring how both sea-level lowlanders and high-altitude natives cope with low oxygen levels.

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  4. From the March 28, 1931 issue

    PRINCE LION-CUB SPEAKS A WORD FOR HIMSELF Milk-teeth are all he has as yet, and most of his active hours are spent in kittenish play; but let something happen to displease him, and for a moment the lion cub gives a hint of the royal terror that will clothe him when he reaches maturity.