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

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The Federal Communications Commission has waived a requirement for Amazon to launch half of its satellite broadband constellation by the end of July, a key regulatory reprieve that buys the tech giant time to get more of its spacecraft into orbit. Amazon won regulatory approval for the Amazon Leo network in July 2020. The FCC’s

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Some limitations should be obvious. This algorithm won’t identify a species it wasn’t trained on or any subpopulations of species that differ too much from the example. The quality of the training data matters a lot, too. If we only use photos of chickadees in pine trees, the model could include pine needles in its

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Five leading scientists were ousted from the annual meeting of the American Diabetes Association (ADA) in New Orleans on Friday. Their crime: handing out copies of an editorial, published in the journal Diabetes Care on April 29, sharply criticizing the Trump administration’s ongoing attacks on scientific research. Those ousted were Steven Kahn, professor of medicine

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Two mountaineers (one of them Reinhold Messner) with Otzi, Europe’s oldest natural human mummy, in the Otztal Alps between Austria and Italy in September 1991. Credit: Paul Hanny/Gamma-Rapho/Getty Images Two mountaineers (one of them Reinhold Messner) with Otzi, Europe’s oldest natural human mummy, in the Otztal Alps between Austria and Italy in September 1991. Credit:

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“This design assessed whether bees could solve the task without continuous perceptual feedback,” the authors wrote. All told, 16 of 22 bees succeed in this task. Granted, the bees could still potentially catch a glimpse of the flower once the ball was near the opening, so the team repeated the experiment with three openings in

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A 2025 analysis of over 22,700 electric vehicles across 21 models found that average battery capacity loss was about 2.3 percent per year, according to the telematics company Geotab. That translates to such batteries still having more than 81 percent of their original capacity after eight years. Waymo’s current fleet of nearly 4,000 vehicles mainly

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At the same time, the plants unable to detect the molecular signature of the caterpillar’s drool were largely ignored by the wasps. They weren’t completely defenseless, though. “There are other papers that show if you knock out all immune signaling, the caterpillars grow twice as big—they get enormous,” Steinbrenner says. This, he suggests, indicates the

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It’s a regrettable reality that there is never enough time to cover all the interesting scientific stories we come across. So every month, we highlight a handful of the best stories that nearly slipped through the cracks. May’s list includes the discovery of a possible prehistoric mining site in the Pyrenees; a new species of

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OpenAI’s diagram is based on choosing c² = 65, which can be satisfied by either 1² + 8² = 65 or 4² + 7² = 65. This means that if the grid spacing is 1/√65, each point will be one unit away from 16 other points: (1,8), (4,7), (7,4), (8,1), (-1,8), (-4,7), and so forth.

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