91É«ÇéƬ

Why does the return journey always seem much shorter than the outward leg on a day trip?

Derek Long,

Cambridge, UK

Do black holes look the same from any angle?

Johnny Cleveland,

Columbus, Indiana, US

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.