Shutterstock/Sigma_S
Why do we say “aww” when we see small, fluffy things?
Charles Joynson,
Rayleigh, Essex, UK
Jochen Tack/Alamy
Which bicycle lights are safest and give the best visibility: pulsating, a fixed beam front and back light, or some other method, such as helmet or backpack lights?
Naomi Stanford,
London, UK
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.
New…



