The engineering problem is always the same: cook the outside without drying the inside, on pieces small enough to be portable. Every tradition below solves it slightly differently. Here are…
What these have in common is exposure. A headland projects into whatever the ocean is doing, which is why the weather on them is rarely the weather a few miles…
Nearly every effect below comes from one of three things: a curved surface that guides sound, a shape that focuses it, or a surface that refuses to reflect it at…
A compass needle points north. Almost everyone knows this and almost nobody knows what it means.
It does not point at the North Pole. The geographic North Pole is a…
Source: Wikipedia
Palaeolithic cave art is among the most extraordinary things humans have left behind, and it presents a problem that almost no other heritage site does: the act of looking…
What distinguishes these from a street of shops is that somebody built a roof over the whole thing on purpose, and then trade organised itself underneath. Here are seventeen.
1.…