A thirsty tomato plant can be surprisingly noisy. Not to us: stand beside it in a greenhouse and you will probably hear nothing beyond leaves rustling and the ordinary sounds of the room. But place an ultrasonic microphone nearby and a diff...
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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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Imagine taking the mass of a mountain and compressing it until its boundary is smaller than an atom. There would be no miniature rocky mountain inside, no visible sphere and certainly nothin...
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Few words sound more futuristic than “robot.” It belongs to Mars rovers, factory arms, humanoid machines and today's arguments about artificial intelligence. Yet the word did not originate i...
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Imagine two identical buildings on the same street. One has a broken window that is repaired the next morning. The other has a broken window that remains shattered for weeks. Graffiti appear...
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Put a slice of aged cheddar in a hot pan and things can become unpredictable. It may soften beautifully, but push the temperature too far and orange oil can pool around clumps of tightening...
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On the evening of May 17, 1884, New Yorkers witnessed a sight strange enough to compete with the bridge beneath it. A procession of circus animals moved across the East River from Manhattan...
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You open a social-media app to check one headline. A war update leads to a natural disaster, which leads to political outrage, an economic warning and a frightening health story. Twenty minu...
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Your passport knows exactly how old you are. Your cells are a more complicated matter. Two people born on the same day can reach middle age with very different cardiovascular health, physica...
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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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