On the morning of November 14, 1963, sailors south of Iceland saw something that looked at first like a ship on fire. A dark column was rising from the North Atlantic. It was not smoke from a vessel but volcanic ash and steam, blasted upwar...
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High on a mountain in late spring, a patch of snow can suddenly look as though someone spilled watermelon juice across it. The surface turns pale pink, rose red or even crimson, sometimes st...
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In daylight, the water may look ordinary — or even unappealingly reddish-brown. Then darkness falls, a wave breaks, and the shoreline suddenly flashes electric blue. Footsteps sparkle in wet...
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Few sights make the Moon seem more theatrical than an early-autumn moonrise. A huge amber disk appears behind trees, rooftops or distant hills, looking far larger than the Moon we see later...
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For many Americans, Labor Day means a three-day weekend, backyard cookouts, crowded beaches, college football and the unofficial end of summer. Retailers turn it into a sales event, swimming...
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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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Every September, the technology calendar suddenly becomes crowded. New phones appear within days of one another. Operating systems move from summer previews to public releases. Chipmakers an...
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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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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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The most spectacular sign of a geomagnetic storm can look almost supernatural. Green curtains ripple across the night sky, red light appears hundreds or even thousands of kilometres farther...
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