Last Word
How long would it take to speed up to 99 per cent light speed? Part 2
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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
Issue no. 3543 published 17 May 2025
