London's Science Museum provides some ingenious tips on how to put that pricey first-class stamp to workWith the announcement yesterday that the cost of a first-class stamp will soar to 60p at the end of the month – the biggest price rise for 37 years – Britons will need to think hard to squeeze the maximum value for money from every item they put in the post. To achieve the necessary efficiency savings, every letter, every package, every postcard, will have to do more work.Inspiration is at hand in this wonderful educational video from London's Science Museum.Whistling the theme tune from Postman Pat, a Royal Mail worker pushes a package through a letterbox on an industrial estate, triggering a seemingly endless train of energy transfers that starts with the sun and a magnifying glass lighting a fuse and finishes with a tank crushing a mechanical toy dog.Along the way, potential...
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