Visual Learning
Everyday machines drawn in code and opened up. Press the steps and watch the parts inside do the work, or switch to Auto and let it run. Every number on screen comes from the same formulas that move the parts.
一根塑料丝，怎样一层层变成立体物体？
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泉水怎样把溶解的岩石，变成一层层彩池？
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A spring let go 8 tiny steps a second, 691,200 ticks a day.
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43 quintillion positions, and why it never falls apart.
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The photo develops outside the camera, in about 12 minutes.
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Why the bunny slips 17 times, and who decides the 18th.
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Measure the speed of light with a chocolate bar.
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Where 9 bar comes from, and why a spring is enough to make it.
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Four strokes, one spark, 1,600 small bangs a minute at idle.
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Why the snack hangs, and how the machine knows it never fell.
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What 1,400 rpm does to wet socks, and why there's concrete inside.
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Why bread sits at 100 °C before it starts to brown.
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Two cutters orbit the pencil like planets around a sun.
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A light and a sensor that are never allowed to see each other.
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It doesn't make cold. It carries heat out the back.
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6 designs, and how many turns it takes to own all of them.
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No ink inside: tiny heaters turn dye into gas.
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No engine on the train: one 60 m climb pays for the whole ride.
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Why the motor lifts only 40 kg, and what happens if the ropes go.
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Wax that is heavy when cold and light when warm, and one 25 W bulb.
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The ringed atom is from 1913. Here is what physics says now.
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