Passkeys are supposed to replace passwords entirely, but a credential created on an iPhone often can't be used on an Android phone. Here's the design decision behind it.

Six state laws took effect Jan. 1, pushing repair protections past a quarter of the country. But a software trick called parts pairing shows how much control manufacturers still keep.

Not exactly a kill switch, but not exactly nothing — the 2021 law behind the scare requires new cars to detect impaired driving. It just doesn't exist yet.

Professional subtitle files are timed down to the frame. The gap between that precision and what actually plays on your TV comes down to three technical culprits -- and one of them gets worse the longer you watch.

Every QR code is missing a fourth corner square on purpose — the asymmetry is what lets your phone read the code instantly from any angle.

Night mode dims blue light and turns your screen orange to protect sleep, but a 2019 study found the color shift alone barely helped — brightness was the real variable.

A look at the DNS hijacking and HTTP redirects that put a login screen between your device and the internet at every coffee shop and airport.

A fast connection that feels slow under load usually isn't your internet plan. It's bufferbloat, a latency problem hiding in oversized router queues, and it's fixable.

An explosion on screen, then the bang a beat later. The gap between the two is Bluetooth doing exactly what it was built to do, just not fast enough.

Two USB-C chargers can look the same, cost the same, and still charge at wildly different speeds. The difference lives in the USB Power Delivery negotiation, not the plug.

A bulging phone case or a laptop trackpad that won't sit flat is usually the first visible sign of a chemical reaction inside a lithium-ion cell that started days or weeks earlier.

Battery Health isn't a bug or bad luck, it's chemistry. Here's what actually degrades a lithium-ion cell, and which habits genuinely speed it up.

The chime you did not ask for has a cause, and it is usually a hearing-safety feature that needs a listening mode switched on to work at all.

Two buttons on the same earbuds, doing exact opposite things. A plain guide to which mode fits the flight, the sidewalk, and the open-plan office.

Noise-cancelling headphones fight sound with sound. Here is how active noise cancellation uses microphones and anti-noise, and why it beats a plane engine but not a nearby voice.

AI data centers are on track to use as much power as Japan by 2030. Here is why the chips draw so much electricity, how much water cooling takes, and what it means for your bill.

Google, Apple and your bank keep asking you to make one. A passkey is a login that never sends its secret across the wire, which is why it beats the password at the thing passwords fail at most: phishing.

The hardest frauds to stop are the ones the victim authorises. Apple's new iOS 27 framework watches the behaviour, not just the password.

From January 2028, new PlayStation titles will ship digital-only. Games out before then keep their discs, but the retail box is on its way to becoming a keepsake.

Google's cheapest image model yet costs $0.034 per 1,000 pictures and, on the company's own benchmark, edges out its pricier sibling.