Xenotransplantation, using animal organs in humans, may sound like science fiction, but it’s quickly becoming a reality. Dr. Sanjay Gupta answers your questions about the progress we have made using ...

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We are honoring the Top 10 winners of our Student Open Letter Contest by publishing their entries. This one is by Fariza Fazyl, age 17. By The Learning Network Alexander M., 16, writes about his ...

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