There is a question about corrosion that people rarely ask and that turns out to be the whole subject.
The question is not why metals corrode. Almost all of them…
There is a category of object where the useful part is the absence rather than the substance, and netting is the clearest example.
A net is mostly nothing. The material…
There is a small group of building materials that go round in a circle, and lime is the clearest.
The cycle is truly closed. A rock is heated to drive…
Source: Wikipedia
There is a particular kind of near-miss in the history of technology, where somebody builds the thing and does not realise what they have built.
Sound recording has an…
Combustion is a push. Everything in an engine exists to convert a series of pushes into smooth rotation, at speed, repeatedly, while managing the heat and friction that produces. Here…
There is a constraint on ships that has no equivalent on land and that determines almost everything about how vessels are shaped and sized.
The constraint is that a vessel…