There it was, completely helpless except for its piercing cry. In 1999, Bai Yun, a seven-year-old giant panda, gave birth to the first panda cub born in the U.S. through artificial insemination. But would the cub survive? As I watched on the closed-circuit monitor with the keeper and a researcher that night, I wondered: How could a mother panda ever sleep and not roll over on her cub?
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