The useful question at any reservoir is why the wall is where it is, because that position was chosen for reasons of geology and geometry that determined everything else. Here…
Maya Linton
Arriving by train differs from every other mode in one respect: you are deposited in a city centre, on foot, with your luggage, in a building that contains most of…
The starting point is a discrepancy. Atomic bonds are extremely strong and the materials made of them are not, by a factor of ten or more - and everything below…
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…
The conversion of sound to signal was solved early and has changed comparatively little in principle. Connecting any telephone to any other took a century of engineering. Here are fourteen…
There is a question that sounds naive and turns out to open a real research problem: does everybody divide colours up the same way?
The physical answer is that the…