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Dallas investigates a potential global helium shortage, Dr Yan tests shoppers on how much they know about radiation, and Liz tries out the new airport security technology that can see beneath your clothes.

Release Date: 2009-07-27
Seasons: 1 2 3 4 5 6 7 8
TMDb: 7.8/10
  • Country: GB
  • Language: English
  • Runtime: 30

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Stem Cell Research, Memory
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Bedbugs, Gravitational Lensing and Statistics
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Nuclear Power
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