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…
Open the fridge and a light comes on. Open the freezer and, on a great many appliances, nothing happens.
The usual explanations are that the cold would break the bulb,…
A tennis ball is a hollow pressurised rubber sphere covered in a layer of fuzzy felt, and the felt is not decoration or grip.
It is the single most consequential…
Every garment carries a row of small symbols on a label, and most people read exactly one of them - the number in the tub - and ignore the rest.…
On the crimped end of a toothpaste tube there is a small coloured rectangle, and a very large number of people believe it is a code.
Green means all natural.…
There are buttons on the sleeve of almost every jacket, and on almost every jacket they do not do anything.
They cannot be undone, because on most garments there are…