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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

CHEETAH acinonyx jubatus, Adult running through Savannah ; Shutterstock ID 1652757304; purchase_order: -; job: -; client: -; other:

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Must the evolution of an adapted trait in nature reach a limit? Part 2

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This week’s new questions

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2CA4Y7K Comet crashing into earth

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How would we spot an antimatter comet in our solar system? Part 2

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What would happen if a spinning disc approached the speed of light?

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Issue no. 3570 published 22 November 2025

New ÒÁÈ˾þà issue 3570 cover
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