Source: Wikipedia
There is a class of invention that is invisible because it is too small to notice, and fastenings are the clearest example on any person's body right now.
The…
There is a particular kind of historical blindness that comes from something becoming cheap.
Salt now costs almost nothing, is available everywhere, and is thought about mainly as a seasoning.…
There is a fact about the past that is difficult to hold onto because it contradicts something we do daily without thinking.
For most of human history, almost nobody had…
Source: Wikipedia
There is a habit of treating zero as obvious, on the reasoning that nothing is a perfectly ordinary thing to have none of.
The difficulty is not the concept…
The shape of a letter is usually treated as a matter of convention, and to a large extent it is. But writing systems designed for a specific material carry that…
The useful question about any old route is what it was for, because the purpose determined the line - and routes made for different purposes look completely different on the…