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This week’s new questions

People say “laughter is the best medicine”, but does it actually help? And are planes noisier when it is colder?

25 January 2023

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

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People say “laughter is the best medicine”, but does it actually help?

Kush Modi (age 11),

Santa Clara County, California, US

BHER2R Gatwick Airport in Snow, Winter 2010

Ams Images/Alamy

I live near Gatwick airport and am so used to the noise of planes that I rarely notice it. However, during a recent cold spell, the planes were a lot louder than usual. Why would this be?

Kieran Evans,

Horley, Surrey, 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…

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