"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.
27 February 2026
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Three weeks after Good's death and a week after the church protest, federal agents fatally shot a second person, intensive care nurse Alex Pretti.
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the end of each business day, all of these slips (which basically constitute
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