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Last word

New Scientist'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

Is the concentration of salt in the oceans gradually increasing?

Last Word

Is the concentration of salt in the oceans gradually increasing?

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ENTETC Robin, (Erithacus rubecula), garden bird standing on top of a branch in winter, UK

Last Word

Do birds actually sleep more in winter?

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Close-up of a Cymbiola nobilis shell, also known as the noble volute, against a black background, featuring its distinctive zigzag patterns and smooth texture; Shutterstock ID 2637416271; purchase_order: -; job: -; client: -; other:

Last Word

This week’s new questions

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2K18TC6 London, UK. 16th Sep, 2022. Shaikha Al Mazrou, Red Stack, 2022, Lawrie Shabibi - Frieze Sculpture, one of the largest outdoor exhibitions in London, including work by international artists in Regent's Park. Credit: Guy Bell/Alamy Live News

Life

Why do we use pillows? part 2

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Issue no. 3580 published 31 January 2026

New Scientist issue 3580 cover
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