Is it more efficient to cart water in a bottle or my stomach? Part 2
More readers wade into the debate on whether it is better to carry a container of water and drink when necessary or guzzle lots of fluid at once
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This week’s new questions
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Comment
It’s good to have a word describing why going viral is now meaningless
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Tom Gauld on moving fast and breaking things
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Twisteddoodles on an unexpected arachnid
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Space
How to spot Haumea, one of the solar system’s strangest objects
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How do two photons become quantum entangled – and can I do it at home?
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Why does some music give us goosebumps?
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When a spirit level is flat, what does that mean relative to Earth?
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This week’s new questions
If you fell into the sun (but magically survived), what sounds would you hear? And how can you ensure that as much of your body as possible can be used after your death?
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Comment
The blue whale: the world’s most versatile measuring stick?
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Mathematics
Artist brings data to life in striking screen prints
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Tom Gauld on a tardigrade’s favourite evening
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Twisteddoodles on an astronaut’s return from space
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