There is a reason haymaking dominated the rural year to the extent it did, and it is not simply that animals needed feeding.
The requirement was absolute. Livestock kept through…
There is a difference between knowing something exists and knowing what shape it is, and the ocean floor was in the first category for a very long time.
That it…
The governing fact is adhesion. Steel on steel produces very little grip, which is efficient on the level and useless on a slope - so the route must be flattened…
Source: Wikipedia
There is an assumption about milling that the word itself encourages, and it is wrong in an interesting way.
The assumption is crushing: two heavy stones pressed together, grain…
Source: Wikipedia
There is a building material available almost everywhere, requiring no processing, no fuel and no transport, and a very large proportion of the world's population has lived in houses…
One rock type, unusually pure and unusually porous, produces a landscape unlike anything around it - dry on top, wet underneath and covered in a grassland that only exists because…