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Last word

New ÒÁÈ˾þÃ'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

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

Last Word

Why do we use pillows? part 3

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cinematic flight through dark deep space asteroid field with stars; Shutterstock ID 2687214359; purchase_order: -; job: -; client: -; other:

Last Word

If Earth exploded, how many rocks would have evidence of life? part 2

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INDIA. Bangalore. 2016. Laughing Yoga workshop participant Rie Sakamoto

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Why do we throw our heads back when experiencing different emotions?

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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:

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How do sea molluscs create the consistent patterns on their shells?

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This week’s new questions

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This week’s new questions

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Issue no. 3583 published 21 February 2026

New ÒÁÈ˾þà issue 3583 cover
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