biology. It is not certain how Carrel obtained his anomalous results. Leonard Hayflick suggests that the daily feeding of nutrient was continually introducing new living cells to the alleged immortal culture. J. A. Witkowski has argued that, while "immortal" strains of visibly mutated cells have been obtained by other experimenters, a more likely explanation is deliberate introduction of new cells into the culture, possibly without Carrel's knowledge. Honors In 1972, the Swedish Post Office honored Carrel with a stamp that was part of its Nobel stamp series. In 1979, the lunar crater Carrel was named after him as a tribute to his scientific breakthroughs. In February 2002, as part of celebrations of the 100th anniversary of Charles Lindbergh's birth, the Medical University of South Carolina at Charleston established the Lindbergh-Carrel Prize, given to major contributors to "development of perfusion and bioreactor technologies for organ preservation and growth". Michael DeBakey and nine other scientists received the prize, a bronze statuette created for the event by the Italian artist C. Zoli and named "Elisabeth" after Elisabeth Morrow, sister of Lindbergh's wife Anne Morrow, who died from heart disease. It was in fact Lindbergh's disappointment that contemporary medical technology could not provide an artificial heart pump which would allow for heart surgery on her that led to Lindbergh's first contact with Carrel. Alexis Carrel and Lourdes In 1902, Alexis B went from being a skeptic of the visions and miracles reported at Lourdes to being a believer in spiritual cures after experiencing a healing of Marie Bailly that he could not explain. The Catholic journal Le nouvelliste reported that she named him as the prime witness of her cure. Alexis Carrel refused to discount a supernatural explanation and steadfastly reiterated his beliefs, even writing the book The Voyage to Lourdes describing his experience, although it was not published until four years after his death. This was a detriment to his career and reputation among his fellow doctors, and feeling he had no future in academic medicine in France, he emigrated to Canada with the intention of farming and raising cattle. After a brief period, he accepted an appointment at the University of Chicago and, two years later, at the Rockefeller Institute of Medical Research. Man, the Unknown (1935, 1939) In 1935, Carrel published a book titled L'Homme, cet inconnu (Man, the Unknown), which became a best-seller. In the book, he attempted to outline