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The surprising science of squeaky sneakers

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It’s not just shoes that squeak when they slide over a hard surface. Bike brakes, rubber tyres, even some biomedical implants like artificial hips have been known to squeal as soft and hard surfaces come into contact with each other.

So to better understand exactly what is causing these noises, a team of researchers have used high speed photography to capture a rubber block sliding across a hard acrylic sheet.

They found pulses more commonly associated with the dynamics of earthquakes driving the squeaks, and tiny bolts of lightning initiating those pulses.

This understanding could lead to advances in engineering, metamaterials or earthquake research – or even new musical instruments.

Read the paper: https://www.nature.com/articles/s41586-026-10132-3

Subscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday: https://www.nature.com/briefing
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science, nature video, #sciencenews
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