Medicine: No Rejuvenation

Dr. Alexis Carrel, who has kept a piece of chicken heart growing for 19 years, last week announced his verdict against rejuvenation. Biologists know a great deal now, he wrote, about how people grow old. They probably will learn what is necessary to retard the aging process. But it will be impossible, he declared, to reverse the action.

Life rushes into existence. The child lives much more in a year than do his parents. Dr. Carrel mentioned tests which give precise indications of an individual's biological (not chronological) age. If a spickle of flesh...

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