A mosquito bite is usually an itchy annoyance that disappears within a few days. During summer and early autumn in the United States, however, one particular mosquito-borne infection repeatedly returns to public-health alerts and search tre...
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When artificial-intelligence stocks surge, most attention goes to the companies designing the chips. Nvidia became the emblem of the AI boom because its GPUs perform much of the enormous par...
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On most nights, Americans who want to see the northern lights need to travel a very long way north. Then the Sun becomes unusually active, NOAA issues a geomagnetic-storm watch or warning, a...
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During Atlantic hurricane season, a disturbance thousands of miles from Florida can become one of the most searched subjects in the United States within hours. A colored blob appears on a we...
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On an autumn Sunday in the United States, a peculiar national clock starts ticking shortly before 1 p.m. Eastern Time. Televisions switch on. Fantasy lineups receive one last nervous inspect...
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There is ordinary tiredness—the heavy-eyed feeling after a late night, a long flight or an exhausting week—and then there is the more puzzling question: Why am I tired all the time? You slee...
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If someone asks when World War II ended, the safest short answer is 1945. If they ask for the exact date, history becomes more interesting. Was it May 8, when Nazi Germany's defeat ended the...
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“Why does my stomach hurt?” sounds like a simple question, but medically it is one of the broadest questions a person can ask. What we casually call the stomach is often the entire abdomen,...
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Artificial intelligence has become one of those phrases that seems to describe everything at once. It can mean the system that recommends a song, the software that detects a suspicious bank...
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On a clear Arctic night, the sky can begin almost imperceptibly. A pale band appears above the horizon, faint enough to be mistaken for a cloud. Then it brightens. The band folds into curtai...
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