What is the best robot vacuum for pet hair? After testing, my cats and I chose 4 top picks for 2026 so far.

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Anthropic is loudly complaining about other companies using Claude to train their models, which seems a touch rich

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马斯克是变脸还是有新计划

"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.