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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

Planet in water - Moon. Science fiction art. Solar system. Elements of this image furnished by NASA; Shutterstock ID 579784837; purchase_order: -; job: -; client: -; other:

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If all Earth’s water were put in a ball, how large would it be?

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Disappointed woman packing for a journey: she is standing in front of her suitcase overfilled with clothes, travel and vacations concept; Shutterstock ID 2314449417; purchase_order: -; job: -; client: -; other:

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How do you get the most clothes into a suitcase? part 2

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cofee cup on the sand at the sunset; Shutterstock ID 1450632401; purchase_order: -; job: -; client: -; other:

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I'm in an arid desert with some caffeinated coffee. Should I drink it?

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MB9M93 Monster Truck Jumping Mid Air

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What are the pros and cons of using carbon dioxide in tyres? part 2

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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

Last Word

This week’s new questions

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Issue no. 3576 published 3 January 2026

Â鶹´«Ã½ issue 3576 cover
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