Playing dirty: Which sport has the highest emissions?
What is the most carbon-intensive sport? Readers respond with their ideas
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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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Shrinking gravity: why doesn’t gravity diminish over time?
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Super seers: why some people can see ultraviolet light
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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?
Dogs don't seem affected in the same way as humans, but do they feel nettle stings? Readers respond
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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?
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