The technical term is an erg. What makes one worth travelling to is usually the dune form - linear, crescent, star or transverse - because the shape records the wind…
Maya Linton
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…
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…
There are a small number of biological rules that hold across every vertebrate: a spine, a heart, and haemoglobin to move oxygen around the body.
The last one has exactly…
Card games spread along the same routes as trade and armies, mutating at every border. Here are seventeen, and what is known about where each came from.
1. Whist -…