This week鈥檚 new questions
When you acclimatise to different weather, what goes on in your body? And why are freezer doors hard to open?
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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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Does a large meal make you tired, and if so, why?
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This week鈥檚 new questions
How long before all human traces are wiped out?
What is the carbon payback period for a wind turbine?
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How can a tree reabsorb its own branch?
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This week鈥檚 new questions
Why are dogs immune to stinging nettles, and could Jupiter ever become a star? Send us your answers
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How does water hydrate us?
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Why do dogs and horses roll on their backs when happy?
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This week鈥檚 new questions
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Far-sighted: How can some people see at great distance?
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