The nose knows: Where does the smell of rust come from?
Rust doesn鈥檛 release molecules into the air but it does sometimes have a smell. Readers explain why
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Radio gaga: Why does a phone cause radio noises?
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This week鈥檚 new questions
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Nuts for apples: Squirrels behaving oddly
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Awful eaters: Does anything eat foxes?
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Come clean: What鈥檚 the difference between shampoo and shower gel?
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This week鈥檚 new questions
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Atomic space: What is in the space between a proton and an electron?
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Hot and cold: Why do you feel cold at the same temperature in winter?
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This week鈥檚 new questions
Why do we get a runny nose going outdoors in cold weather, and how do we know the universe is expanding. Send us the answers
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Room for improvement: Compliment first or bad news first?
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This week鈥檚 new questions
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Mulberry stains: why do milk and juice make them disappear?
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Fumbling fingers: Why do fingers get clumsy in the cold?
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