The National Zoo also announced Friday that the newborn is a boy, a tough determination to make since a baby panda’s reproductive organs aren’t fully developed, The Washington Post noted. Alternatively, doctors figure it out by examining the chromosomes. The surviving newborn’s twin died on Wednesday after vets had some difficulty swapping the two cubs with their mom; the panda wouldn’t release the cub in her arms. Twins born in the wild generally don’t both survive because the mother is unable
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Surviving panda cub is male
