United States Department of Energy

Three credible sources, three different numbers — and the gap isn't new explosions. It's what each one decided to count.

The gun-type bomb was never tested — yet it was the one they trusted. What Hiroshima's design and aftermath reveal about nuclear war.

From Edison's carbon filament to the blue LED that unlocked white light — how we got from 1 lumen per watt to 150.

The most secretive objects on Earth move by truck on civilian highways — and people photograph them at rest stops.

Lux sensors sound simple until the lights you turn on trip the sensor that turned them on. Here's the full chain, from Aqara T1 to Matter's missing...

A friend's "you're stewing in your own dirt" comment ruined baths for Daniel for years. Here's what the research actually says.

Real warheads aren't cinematic — they're warm, gold-plated, softball-sized pits inside floor vaults under aircraft shelters.

A fried fiber modem raises the real question: where do you draw the line between preparedness and "done enough"?