Super seers: why some people can see ultraviolet light
It turns out that some people can see ultraviolet light. Readers explain how this can happen
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This week鈥檚 new question
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Can you make a screen adjust for those who are short-sighted?
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Strangers in dreams: are they real people or inventions?
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This week鈥檚 new questions
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Nettle effect: Why don’t dogs seem affected by stinging nettles?
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Hourglass figure: Why do wasps have such narrow waists?
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Getting used to it: How do we acclimatise to different temperatures?
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This week鈥檚 new questions
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Cold feat: Why is a freezer door hard to open just after you shut it?
Readers explain what happens inside a freezer after you open the door and shut it, and suggest ways to make it easier to get in again
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Sitting pretty: sitting is harmful, but how exactly is it bad?
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This week鈥檚 new questions
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Why do some people like science and others don鈥檛?
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Coil conversion: on the energy of a compressed spring in acid
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