Do Oxygen Levels Go Down in Winter? - a podcast by Dr Chris Smith

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... Like this podcast? Please help us by supporting the Naked Scientists

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