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Last word

Â鶹´«Ã½'s popular Last Word series gives readers the opportunity to answer each other's questions about everyday science phenomena, from the shape of scones to the evolutionary history of toenails. To answer a question or ask a new one, email lastword@newscientist.com

A diver catches an octopus underwater

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Why do humans pat animals on the head? (continued)

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Big dog meets small dog; Shutterstock ID 2045462630; purchase_order: -; job: -; client: -; other: -

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How do dogs recognise other dogs when there are so many canine types?

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2J9HJCG Smiling woman wearing towel spraying deodorant on body at home

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Spraying a can of deodorant, why does it get cold when it runs out?

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B1PP5G Spiral Galaxy M74 i. Image shot 2008. Exact date unknown.

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This week’s new questions

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Issue no. 3456 published 16 September 2023

Â鶹´«Ã½ issue 3456 cover
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