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Last word

New ¾«¶«´«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

Male nose close up bottom view - hair in the nostrils; Shutterstock ID 1895123341; purchase_order: -; job: -; client: -; other: -

Last Word

I see why we have two eyes and ears – but why two nostrils? (Part 2)

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JAPAN. Tokyo. Bank near Tokyo Station. 2002.

Last Word

How much money is gained or lost in computer rounding errors annually?

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White hydrogen storage tanks with blue H2 labels, set against a blue sky with clouds, symbolizing clean energy. 3D Rendering; Shutterstock ID 2460820695; purchase_order: -; job: -; client: -; other: -

Last Word

Would using Earth's white hydrogen deplete our oxygen supply?

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2WA289F The supermoon rise at the Nature Discovery Sanctuary in Winkler, Manitoba, Canada.

Last Word

This week’s new questions

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Issue no. 3545 published 31 May 2025

New ¾«¶«´«Ã½ issue 3545 cover
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