91É«ÇéƬ

Large planets have more distant horizons than small ones, but lower mountains due to higher gravity. On which would you see further?

Hillary Shaw,

Newport, Shropshire, UK

Other than humans, animals just eat what they find, as they find it – no cooking, no washing, Why aren’t they vomiting all the time?

Robert Watson,

Jesmond, 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, daytime telephone number and email address.

91É«ÇéƬ retains total editorial control over the published content and reserves all rights to reuse question and answer material that has been submitted by readers in any medium or in any format.

Terms and conditions apply.