High-speed imaging reveals that the squeak of soft–rigid frictional interfaces, like sneakers sliding on a basketball court, arises from intersonic opening slip pulses—analogous to earthquake ruptures—that thin ridges on the rubber confine to repeat at a musical frequency.
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The nuclear talks today are the third between the US and Iran since June 2025, when the US joined Israel’s war against Iran and bombed its nuclear and military sites. It effectively ended the US-Iran talks that were held in the weeks prior to the conflict aimed at reaching a nuclear peace agreement.
Researcher: Tom Hunt