The test is simple: pigment colour looks the same from every angle, and structural colour changes as you move. Once you know that, a great deal of the natural world…
Maya Linton
Ask most people whether counting is natural and they will say obviously yes. Every culture counts. Children learn numbers early. It feels less like a skill than a faculty.
The…
Every pass is a compromise between height and distance: the lowest crossing point is rarely the shortest route, and the route that everyone took is whichever combination was survivable. Here…
Pitch depends on how fast something vibrates, and everything below is a different method of controlling that rate and then getting the vibration into the air loudly enough to hear.…
The useful habit when standing in an unfamiliar square is to look at what faces onto it, because the buildings around the edge record who wanted the space and what…
Picture a world map. North is at the top, south at the bottom, and it feels less like a convention than a fact — as settled as the ground being…