Do Oxygen Levels Go Down in Winter?

17 December 2010
Presented by Chris Smith, Redi Tlhabi.

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How did a lightning storm spark a glowing ball above a roof, do atmospheric oxygen levels dip in winter, does anyone naturally not have fingerprints, are humans still evolving, and what's the story behind Lorenzo's Oil? Join Dr Chris for an intellectual work out with this week's round up of brain-stretching science...

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