There is a common way of describing chimneys that gets the direction of the mechanism backwards and consequently makes every practical problem inexplicable.
The description is that smoke rises and…
Two processes determine the result: what roasting creates, and how much of it the water takes out. Almost every difference between one cup and another is one of those two.…
Light leaves every point of a subject in all directions. A lens collects some of that and reconverges it, and the entire craft is built on the properties and failures…
The heat does not exist in the seed. It is created on demand when the cell structure is broken and water is present, and it is unstable from the moment…
The hard part of a clock was never the gears. It was finding something that does the same thing over and over at exactly the same rate, and then extracting…
There is a useful test for whether an ability is special: look at what the nearest relatives can do.
For most human capabilities, the answer is that they do something…