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 transaction, a program that recognizes a tumor in...
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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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Some of the most senior people inside the U.S. military recently found themselves in an unusual position: sitting in a room, connected to physiological sensors, answering questions while inv...
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On the evening of October 29, 1969, a student programmer at UCLA began typing a word into a computer. The machine was connected over a network to another computer at the Stanford Research In...
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Taste a drop of seawater and the answer seems obvious: the ocean contains salt. The more interesting question is how it got there. There are no gigantic salt deposits steadily dissolving int...
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Look closely at the tip of your finger and you are looking at a landscape that began forming months before you were born. Ridges curve, split, stop and rejoin in patterns so detailed that th...
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Seal a cat inside a box with a radioactive atom, a radiation detector and a mechanism capable of releasing poison. Arrange the experiment so that, after an hour, the atom has a 50 percent ch...
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Few foods carry a national story as neatly as Pizza Margherita. Red tomato, white mozzarella and green basil seem to reproduce the Italian flag on a circle of dough. According to the story r...
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You may already have yawned simply because you read the word. If not, there is a reasonable chance that a photograph or video of someone opening their mouth in a long yawn would do the job....
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A dog stops halfway through a walk, lowers its head and begins grazing with the concentration of a miniature cow. For many owners, what happens next seems obvious: the dog must have an upset...
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