The sky is so reliably blue on a clear day that the color can feel like a property of the atmosphere itself, as though Earth were covered by an enormous blue ceiling. It is not. Air is essentially transparent over short distances, sunlight...
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Every email, video stream, security-camera frame, cloud backup, online purchase, AI response and sensor reading leaves a digital trail. Multiply those events across billions of people, phone...
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Look down at almost any laptop, desktop keyboard or smartphone in the English-speaking world and the first six letters are the same: Q-W-E-R-T-Y. The arrangement feels so inevitable that it...
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Ask a modern AI whether it is frightened, lonely or aware of its own existence and it may produce an answer that sounds uncannily introspective. It can discuss its “thoughts,” describe imagi...
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Every few years, a headline or social-media post seems to announce the same piece of cosmic good news: Pluto is a planet again. For anyone who learned the old nine-planet Solar System in sch...
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If Mars can come within roughly 55 million kilometers of Earth, why does a spacecraft sent there travel something closer to 480 million kilometers — and spend around seven months doing it? T...
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Science-fiction space battles have trained us to expect a particular soundtrack: engines roar, lasers crack and exploding spacecraft detonate with a cinematic boom. Put the same battle in th...
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There is a moment at almost every birthday party when the room changes. The lights dim, a cake appears, tiny flames tremble above the icing and everyone waits while one person silently makes...
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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...
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Stay in a swimming pool or bathtub long enough and something peculiar happens to your hands. The smooth pads of your fingers turn into a landscape of ridges and valleys, as if the skin has s...
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