What makes some people short-sighted and others long-sighted?
In the eye, what exactly leads to short- and long-sightedness? Does environment play a part or genetics?
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Are lids getting harder to open? (continued)
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To brew the best coffee, must you start with cold water?
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This week鈥檚 new questions
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Why does milk spill over when it boils?
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Why don’t we make disease cures that are themselves infectious?
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What would it look like if dark matter fell into a black hole?
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This week鈥檚 new questions
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How did people in the Arctic get vitamin D with little or no sunlight?
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This week’s questions
What is the maximum number of rainbows that can occur at the same time and where's the best place to see them? Plus, what is the biological advantage of crying when emotional?
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Are tandems really more efficient than regular bikes? (continued)
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Deep-sea hydrothermal vents team with life. How are they colonised?
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Why do waves always appear to roll towards a beach, not the other way?
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This week鈥檚 new questions
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