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A twist on the candle mystery

In a classic demonstration of the candle mystery, three lit candles of different heights are covered with a gas jar (see figure 1) and the tallest candle goes out first. This happens because carbon dioxide produced from burning has a higher temperature, so it rises and accumulates at the top of the…

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Maggie Aderin-Pocock: a career in space

As a child, Maggie Aderin-Pocock dreamed of going into space. She hasn’t quite managed it yet, but she’s got pretty close, as she…

             


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