1+ day, 12+ hour ago   (812+ words) Picture this: you put a mug of water in the microwave for tea. Three minutes later it sits there, still and quiet. No bubbles. You drop in a teabag, and the water erupts over the rim like a small geyser....

3+ day, 10+ hour ago   (1494+ words) Picture this. An air conditioning technician stands in your driveway, clipboard out. He says your house needs a three-ton unit. You nod. Then you look at the metal box by the wall, the one two people carried in without much…...

5+ day, 12+ hour ago   (1568+ words) Every few months a headline announces that the Moon could power the Earth. A startup wants to mine it. A space agency lists it as a reason to go back. The word in all of those stories is helium-3. Close…...

1+ week, 12+ hour ago   (1376+ words) Picture the engine in your driveway. Four cylinders in a hatchback, six in a pickup, eight in anything that rumbles at a stoplight. Ask any car person and you get the same tidy rule. Even is smooth. Odd is buzzy....

1+ week, 2+ day ago   (1479+ words) Dive to the bottom of a swimming pool and hold still. Your ears ache. That is the weight of three meters of water pressing on your eardrums, and it already hurts. Now watch a waterjet cutter at work, like the…...

1+ week, 4+ day ago   (1498+ words) Here is a fact that stops people cold. On March 11, 2011, a giant earthquake struck off the coast of Japan. It moved the island. It shifted a point deep inside the planet. And it made the day a tiny bit shorter....

1+ week, 6+ day ago   (1141+ words) Picture a summer storm. The wind takes out a line down the street, and the whole neighborhood goes dark. No problem, you think. You have twenty solar panels bolted to your roof. Morning comes. The sky clears. The sun climbs,…...

2+ week, 1+ day ago   (1599+ words) Picture the last time you built flat-pack furniture. You are on the final panel. You lean into a Phillips screw, the driver bites, and then it happens. The tip rides up out of the cross with a nasty crunch and…...

2+ week, 5+ day ago   (1068+ words) That is a real paradox, not a play on words. Massless pieces, adding up to something with mass. To see how that works, we have to slow down on a word we use all day and rarely pin down. Mass....

3+ week, 11+ hour ago   (1653+ words) Picture a backyard on a hot afternoon. A salt-water swimming pool sits there, clear and blue, cleaning itself. The owner poured in bags of ordinary salt, flipped a switch, and never touched a jug of chlorine. Somehow salt plus electricity…...