Shutterstock/amretsunique
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
Jan Stria/Shutterstock
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,…



