Come clean: What’s the difference between shampoo and shower gel?
Are shampoo and shower gel different, and if so, how? It turns out to be surprisingly hard to answer this question, but there are some distinctions
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This week’s new questions
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Camera precaution: what can be done to stop migrant deaths in lorries?
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Kicking the habit: is there any point stopping smoking in later life?
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This week鈥檚 new questions
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Twit or true: are owls really intelligent?
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Number games: how to choose a PIN
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This week’s new questions: all about mulberries
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Burning hot: Are all flames the same temperature?
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Dead before his time: a question about time travel
How would you know a fossil human had not time travelled to the past? Readers respond
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This week鈥檚 new questions
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Playing dirty: Which sport has the highest emissions?
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Web sense: How do spiders move around their webs?
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This week鈥檚 new questions
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