¿ìè¶ÌÊÓƵ

Web sense

How are spiders able to move so quickly along their webs without getting their legs entangled?

Mantz Yorke, Manchester, UK

Playing dirty

In view of the need to reduce emissions because of climate change, which sport has the highest carbon footprint after considering all factors?

Chris Humphries, Scunthorpe, Lincolnshire, UK

To answer these questions – 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.

¿ìè¶ÌÊÓƵ 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.

You can also submit answers by post to: The Last Word, ¿ìè¶ÌÊÓƵ, 25 Bedford Street, London WC2E 9ES.

Terms and conditions apply.