
Last Word
If a cyclist and runner exercise together, who expends more energy?
Regulars
Âé¶¹´«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
Issue no. 3446 published 8 July 2023