Why don鈥檛 birds eyeballs freeze in the extreme cold?
When birds are flying at altitude in the extreme cold, why don鈥檛 their eyeballs freeze? Readers respond
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What is dust, and is it harmful to human health?
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This week鈥檚 new questions
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What鈥檚 the best swimming stroke in terms of calories burned?
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Why are animals stripy and why can’t humans have patterned hair?
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This week’s new questions
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What鈥檚 better for the environment, using a hand dryer or paper towels?
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What happens to the energy of a moving car when it hits a wall?
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This week’s questions
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Why do cars have speed limits 鈥� is it physics or just practicality?
A curious reader asks: why can鈥檛 even the most powerful road cars travel over 350 kilometres an hour? Lift, wind resistance and human factors all play a part
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Why is toast so different from bread heated in a microwave?
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This week鈥檚 new questions
Core subject: how does Earth’s magnetic field arise?
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Why does the jet stream affect our weather?
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