Stand on a beach and the ocean looks almost two-dimensional: a glittering surface stretching to the horizon. The reality underneath is closer to an inverted mountain world. Plains, ridges, volcanoes, canyons and trenches disappear beneath k...
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You check your phone and it is 4:44. Later, a receipt ends in $4.44. That evening, three fours appear in an address or a license plate. After the third encounter, coincidence can start to fe...
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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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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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Step out of a dark cinema into brilliant afternoon sunlight and, for some people, the reaction is immediate. The eyes narrow, the nose begins to tingle and within seconds comes an involuntar...
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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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You walk into a café you have never visited. The tables, the light from the window and the conversation at the next table suddenly feel uncannily familiar. For a few seconds, there is an ove...
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