How QR Codes Work
A QR code looks like a glitchy chessboard, but it's an engineered grid that can survive coffee stains, sun glare, and a 30-degree tilt.
🔬 3m
Rabbit hole
How Does That Work?
Mechanisms behind the ordinary objects you use every day.
7 guides
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7 guides
How Noise-Canceling Headphones Work
They don't block sound — they fight it. Inside each earcup, a microphone listens and broadcasts the exact opposite of what it hears.
👁️ 2m
How Tap-To-Pay Works
You tap, you beep, you leave. Behind that half-second is a handshake, a cryptography trick, and a one-time-use number.
⏱️ 2m
How Elevators Decide Where To Go
In a busy building, the elevator you're waiting for isn't the one closest to you — it's the one a computer thinks should come.
✋ 2m
How A Microwave Heats Food
A microwave doesn't cook from the outside in. It shakes water molecules directly — which is why a hot dog steams in 30 seconds and your bowl stays cold.
❓ 2m
How A Zipper Works
Two parallel rows of teeth, a tiny wedge that forces them to interlock, and a slider that locks and unlocks them — the most elegant mechanical everyday object.
🔬 2m
How Barcodes Read A Product
A laser or camera scans a pattern of lines and turns it into a number — and a number into a product, a price, and a place in the world.
👁️ 2m