Q.E.D. The power of sound / producer, Chris Thau ; BBC.
When Dr John Pond is not in his milkshed, he's in the laboratory at the back of his farmhouse. As a child he was fascinated by sound and played music to the cows to see if it would improve the milk yield. Now he studies the amazing power of ultrasound, which can mix mayonnaise and weld heels to...
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