Where do galaxies begin and end?
Finding the edge of a galaxy isn鈥檛 a simple matter - and depends on mysterious dark matter
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This week鈥檚 new questions
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Is it normal behaviour for rooks to bury bread rather than eat it?
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Do magnets have any effects on human cells?
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Have we found the answer to the mystery of the impossible rainbow?
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This week鈥檚 new questions
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Do frogs notice when it is raining?
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What is the most eco-friendly way to deal with our bodies after death?
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This week鈥檚 new questions
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Absolute zero is the lowest temperature but is there an upper limit?
Yes, there is a highest possible temperature, but calculating it isn鈥檛 straightforward, explain our readers
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What is the difference between a cake, a sponge and a biscuit?
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Grinning is a sign of aggression in animals, so why do humans smile?
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This week鈥檚 new questions
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Are there any evolutionary advantages of perimenopausal hot flushes?
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