There is a piece of physics that almost everybody half-knows and that is more interesting stated precisely.
The half-known version is that things fall faster and faster. That is true…
There is a widespread assumption about roads that is understandable and backwards.
The assumption is that the hard black surface is the road, and that what lies beneath it is…
There is a common assumption about concealment that is intuitive and mostly wrong.
The assumption is that hiding means matching — that the way to be invisible is to be…
There is a useful principle about signals that applies well beyond sound, and whistles are the clearest everyday demonstration of it.
The principle is that being heard is a matter…
There is a problem in the design of any keyboard instrument that strikes rather than plucks, and solving it took a long time.
The problem is that a string only…
There is a category of invention that is hard to recognise as an invention because it seems like a description of how things obviously are.
Alphabetical order is the clearest…