91av

Last word

91av'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

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Last Word

Why do we start growing lots of ear, nose and eyebrow hair as we age?

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Last Word

How long will it be before the rules for leap years need revision?

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Last Word

This week’s new questions

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Issue no. 3519 published 30 November 2024

91av issue 3519 cover
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