Do all planets spin? If so, why?
Whether a planet is spinning depends on where you are viewing it from, say readers
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This week鈥檚 new questions
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Why is this strange rainbow at the wrong height?
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Do plants, fungi or microorganisms get cancer?
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Why do two musical notes an octave apart sound the 鈥榮ame鈥�? (part 3)
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This week鈥檚 new questions
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What would happen to our planet if the sun suddenly disappeared?
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Is there an advantage to insects of their bites making us itch?
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What are the origins of the yoghurt-making bacteria in milk?
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This week鈥檚 new questions
When animals show their teeth it usually signals aggression, so when did humans start doing it to show mirth or friendship? And how does water become "stale"?
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How fast should I cycle to avoid punctures?
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If sitting cross-legged is bad for us, why is it so comfortable?
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Is there any harm in drinking too much tea? Part 2
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This week鈥檚 new questions
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