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Dr. Alexis Carrel, 65. Most famed of the five, bald, poetic Dr. Carrel won the 1912 Nobel Prize for his remarkable success in suturing blood vessels and transplanting organs. For 27 years he has kept a scrap of chicken heart alive and growing. Every few days the heart has to be trimmed, for it spreads so rapidly that if left alone it would fill the laboratory in a year. At present Dr. Carrel is continuing experiments with Colleague Charles Augustus Lindbergh on the "perfusion pump" (TIME, June 13), which keeps other disembodied organs alive outside the parent body for indefinite periods of time. Next July Dr. Carrel expects to return to his native France.