Photo by Dasha Petrenko/imageBROKER/Shutterstock
When we make an effort, why do we screw up our faces and close our eyes? This is of no apparent help and is likely to make us more vulnerable to predators.
Dorothy Woolley
Newark on Trent, Nottinghamshire, UK
wildestanimal/Shutterstock
Why don’t marine mammals like whales get “the bends”?
David Garnett
Rapid Creek, Northern Territory, Australia
To answer this question – or ask a new one – email lastword@newscientist.com.
Questions should be scientific enquiries about everyday phenomena, and both questions and answers should be concise. We reserve the right to edit items for clarity and style. Please include a postal address,…
