How a Computer Stores Information
Everything a computer holds is patterns of two states. The interesting part is not the binary, it is the ladder of storage types trading speed against size and cost.
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How Does a Plane Stay Up?
A wing generates lift by pushing air downwards. The popular explanation involving air travelling further over the top is wrong, and the correct one is simpler than it sounds.
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How Photosynthesis Works
Plants build themselves out of air. Photosynthesis uses light energy to split water and attach the hydrogen to carbon dioxide, producing sugar and releasing oxygen as the leftovers.
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What Is DNA, Simply Explained
DNA is a long molecule that stores instructions as a four-letter code. The code is copied when cells divide and read out in pieces when a cell needs to build something.
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How the Internet Actually Works
The internet is not a thing owned by anyone. It is thousands of separate networks that agreed to speak the same protocol, passing your data along in small packets that each find their own way.
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How a Battery Actually Works
A battery does not store electrons in a box. It stores two chemicals that want to react, and forces the electrons to take the long way round through your device.
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Newton’s Laws Simplified
Three rules cover most everyday motion: things keep doing what they are doing, force equals mass times acceleration, and every force comes in an equal and opposite pair.