NOVA scienceNOW

10th Planet, Twin Prime Conjecture, Ivory-Billed Woodpecker, Pandemic Flu, Lab Meat?, Stem Cells (1x5)

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Featured segments include: a possible tenth planet in our solar system, the twin prime conjecture, a possible reappearance of the ivory-billed woodpecker, a look at the bird flu and whether it will move to people, the growing of meat in a laboratory culture, an update on stem cells, the link between hurricanes and global warming, and a profile of cancer researcher Tyler Curiel.