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Strain creates moiré 2D materials without twisting or stacking, opening more scalable route

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Nature's 'master painters': Study reveals how damselflies break optical barriers to create saturated colors

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Understanding how things connect helps people invent, 1,200-player experiment suggests

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Overlooked DNA structures help organize the genome

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Medieval pandemic left a hidden legacy in Europe's oldest trees

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'Genetic brakes' reveal how embryos shape their limbs

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Three key vital signs make up the "urban pulse" of a city

People often speak metaphorically of the heartbeat or pulse of a city, but according to the authors of a new paper published in the Proceedings of the National Academy of Sciences, cities do indeed have an "urban pulse"—an indication of urban "metabolic activity" that can be measured to suss out telltale patterns. And those patterns could help inform future public policy around urban planning. The precise definition of urbanization has shifted over the centuries.

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Three key vital signs make up the "urban pulse" of a city

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Satellites reveal cities' 'urban pulse,' tracking neighborhood growth in near real time

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Phys.org 1d ago

Six roads to safety: A critical threshold for wildfire survival

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