Source: Wikimedia Commons
In 1974 an American school emptied itself to the sound of a mechanical bell that said nothing except now, and everybody in the building already knew what to…
Fire engines are red almost everywhere, it is one of the most universally recognised conventions in use, and there is a substantial body of research indicating that red is close…
Source: Wikimedia Commons
The Box Was in the Cellar and It Was Nobody's Favourite Errand
The fuse box lived in the basement, a back hallway, a closet under the stairs or…
On the flat pins of a plug there are usually small round holes near the tip.
They are not there for anything you are supposed to do with them, they…
Look at the cap of a cheap ballpoint pen. There is a small hole in the top of it.
Most people assume it is a moulding artefact, or something to…
Every tyre on every car has a built-in gauge telling you when it is worn out, and almost nobody uses it, largely because almost nobody knows it is there.
It…