Have we found the answer to the mystery of the impossible rainbow?
The long-running puzzle of a rainbow that is too low might have been solved by our readers
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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?
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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?
Hot flushes could just be a side effect of the perimenopausal changes in hormones, but could there be any benefits to them?
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How can we know that time exists?
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Why are bird droppings white, considering all they eat? (part 2)
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This week鈥檚 new questions
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What is the best way to tie shoelaces?
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