You are almost asleep when the floor seems to disappear. For a fraction of a second, your body feels as though it has stepped off a ledge. A leg kicks, an arm jerks or your whole torso jumps, and suddenly you are awake again with your heart...
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It often begins so subtly that you wonder whether you imagined it: a tiny flutter under one eye, a faint pulse in the eyelid, then another. A few minutes later you are staring into a mirror,...
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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 repeate...
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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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You are reading an email, driving home or trying to fall asleep when one eyelid begins to flutter. It stops. Ten minutes later it starts again. By the third day, a tiny muscle movement that...
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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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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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Space is a vacuum, so an astronaut cannot simply lift a visor and take a sniff. Yet crews returning from spacewalks have repeatedly described something remarkably close to a smell of space:...
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Imagine waking up to find dozens of people dancing in the streets — not for joy, but because they couldn’t stop. This strange episode unfolded in Strasbourg (modern-day France) in the sum...
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