粘着テープを剥がすときの「ピーッ」という音は音速超えの衝撃波によって引き起こされていることが判明

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Hormonal contraceptives may subtly reshape how partners feel about each other. Research suggests that pills which flatten the natural ebb and flow of fertility can dampen shifts in attraction that typically occur across the menstrual cycle, potentially altering initial mate choice.

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"Tuning frictional behavior on the fly has been a long-standing engineering dream," said co-author Katia Bertoldi of Harvard University. "This new insight into how surface geometry governs slip pulses paves the way for tunable frictional metamaterials that can transition from low-friction to high-grip states on demand.” In addition, the dynamics revealed by these results are similar to those of tectonic faults and thus give scientists a new model for the mechanics of earthquakes, according to their new paper published in the journal Nature.