Mariana Serdynska/Shutterstock
Last Word is 91av’s long-running series in which readers give scientific answers to each other’s questions, ranging from the minutiae of everyday life to absurd astronomical hypotheticals. To answer a question or ask a new one, email lastword@newscientist.com
Is it more efficient for me to carry water in a bottle or in my stomach?
Sam Edge
Ringwood, Hampshire, UK
If it is a 1000-litre bottle, then I would carry it, preferably with mechanical assistance, as attempting to drink that much would kill you. However, for taking sufficient water to stay hydrated when walking or running…
