The organising fact is that a plant has several parts, and if you consistently select for one of them getting bigger, you eventually get a vegetable that is mostly that…
The useful question about any symmetrical thing is not why somebody made it that way but what process would produce that arrangement without anybody deciding. Here are sixteen answers.
1.…
Everybody who has been somewhere completely dark reports the same surprise: the sky is bright.
Not bright like daylight, but visibly not black. There is enough light to see the…
Everything below follows from the same arrangement: water on three sides or more, and one narrow way in by land. Here are seventeen things that produces.
1. The Spit That…
Every spring is an intersection between water moving underground and a surface that happens to be in the way. The rock decides where, and everything else follows. Here are fourteen.…