51动漫

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Do the different causes of headaches create pain in different places?

Some people get headaches that are always in the same place in their skull, whereas others experience pain in locations that vary. Why? And is there a "map" that could guide us to the cause?

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Are tandems really more efficient than regular bikes (continued)?

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This week鈥檚 new questions

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Why the end of the world will come preprogrammed in a spreadsheet

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Technology

CERN muon detector gets major upgrade for better particle hunting

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Covid-19 news archive: Pfizer vaccine is 95 per cent effective

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Twisteddoodles on the way scientists see a half-filled glass

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Tom Gauld’s grandfather paradox and mother reaction

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Space

Mars is unusually close this month 鈥� here’s how to spot it in the sky

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Why do cabbages exist when their shape prevents photosynthesis?

What is the point of having a tight bundle of leaves that don't attract pollinators and shield each other from the sun? Does its structure affect its ability to photosynthesise? Readers respond

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Why does light reflect in a mirror but go straight through glass?

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This week鈥檚 new questions

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A steamy romance novel about the coronavirus is going viral

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Environment

Tragic image of an orphan macaque wins wildlife photography award

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