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The Great Sperm Race

Guided by the expertise and imagination of top scientists, the journey of conception has been scaled up 34 000 times to illustrate, in all its wonder, one of the most extraordinary competitions on earth.

Part funded by the Wellcome Trust, 'The Great Sperm Race' was broadcast on Channel 4 on 23 March 2009. Watch highlights below (running time: 2 min).

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