This week鈥檚 new questions
Why doesn't gravity diminish with time, and is it possible for humans to see UV light?
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End of an era: how long did it take the dinosaurs to die out?
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Fresh fruit: does washing produce reduce the risk of food poisoning?
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This week鈥檚 new questions
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Freewheeling: does one finger provide significant support on a bike?
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Time and tide: what is the smallest body of water with lunar tides?
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This week鈥檚 new questions
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Clean limbs
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Still waters
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Battery power
Why has there never been an international standard requiring manufacturers to display the capacity of alkaline batteries? All we have to go on is words such as "super power" or "long life" on the packaging. I want a number!
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This week鈥檚 new questions
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Why does a lightning strike sizzle and power light bulbs?
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This week鈥檚 new questions
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Why do biscuits go soft and cakes go hard?
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