Why is the noise so loud when bottles drop into the recycling hopper?
When glass bottles are emptied into recycling bins, what makes the sound so deafening compared to when other items are thrown in? Readers respond
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This week鈥檚 new questions
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What is the smallest animal with eyes and could it see a molecule?
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Where does the spin of celestial objects come from? The big bang?
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Plastic is inert, so why does it have a taste and smell?
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This week鈥檚 new questions
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How long is 鈥榥ow鈥�, the gap between the past and the future?
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Can you get triple or quadruple rainbows? (continued)
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If plants communicate via their roots, do they get lonely in pots?
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This week鈥檚 new questions
How far would you have to travel away from the sun for it to no longer be the brightest object you can see? And what advantage does mimicry give to birds?
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Why are tree leaves so many different shades of (mainly) green?
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Can satellites have satellites that have satellites?
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Why do cabbages exist when their shape prevents photosynthesis?
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This week鈥檚 new questions
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