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This week’s new questions

Why do we say “aww” when we see small fluffy things? And which bicycle lights are safest and give best visibility: pulsating, fixed-beam ones, or some other method such as helmet or backpack lights?

22 November 2023

purebred beagle puppy is learning the world in first time; Shutterstock ID 566398009; purchase_order: -; job: -; client: -; other: -

Shutterstock/Sigma_S

Why do we say “aww” when we see small, fluffy things?

Charles Joynson,

Rayleigh, Essex, UK

FE11X8 Cyclist driving, at dusk, in a city street, with and without lights and safety clothing, bike safety, visibility at night

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.

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