A key question: The secrets and security of a rotor-style lock
How secure is a four-rotor lock? Continuing the discussion with an eye and lock-opening reader contribution
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This week鈥檚 new questions
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Lucky dip: What’s the best strategy for winning the lottery?
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Itchy and scratchy: why doesn’t a mosquito bite stop being itchy?
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This week鈥檚 new questions
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How far do we travel through the universe in our lifetimes?
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Why does menthol give me a cold sensation in my nose?
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This week’s questions
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Clucking dinosaurs
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Foam over
When I drain a can of chickpeas, the liquid forms a soapy foam. What causes this, and if it is related to soap, could it be used as an eco-friendly replacement?
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This week鈥檚 new questions
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Why are some foods delicious to some people and disgusting to others?
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Does having flowers in hospital wards harm patients鈥� health?
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This week鈥檚 new questions
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