HomeSeptember 29, 2026
PTFE Sheds Food by Offering Almost Nothing to Grip
The nonstick coating on your pan is a polymer discovered by accident in 1938. Here's what PTFE is, how it works, and what changed about how it's made.
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TechSeptember 29, 2026
PWM Dimming Flickers Your Screen Faster Than You Can See It
OLED pixels shift color when you dim them with voltage. PWM switches them on and off instead. Here's why that causes flicker and how phone makers are fixing it.
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MoneySeptember 26, 2026
Two Separate Defenses Stop Most Printers From Copying Cash
Cotton paper, raised ink, a hidden constellation, and a secretive software system each stop a photocopier before it can make a copy.
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CarsSeptember 25, 2026
The Immobilizer Cut Car Theft Far More Than Rolling Codes
Rolling codes prevent replay attacks, but they don't stop relay attacks or CAN injection. The immobilizer is the defense that cut car theft by 80%.
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CarsSeptember 24, 2026
How Tire Tread Grooves Actually Prevent Hydroplaning
Tread grooves channel water out of the contact patch. When they can't drain fast enough, the tire lifts off the road. Here's the physics and the thresholds.
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CarsSeptember 22, 2026
Coasting in Neutral Wastes More Fuel Than Idling in Gear
The old advice to coast downhill in neutral was correct for carbureted engines. Electronic fuel injection and deceleration fuel cut-off flipped it.
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