Measurement

When I was baking bread with my gf, made me think of measurement. We use pound on food, made me wonder where pound came from.

I think that pound, foot etc. is more of a human friendly measure unit. 1 pound of flour make a loaf of bread, a quarter of it is about 4 slices, enough for lunch. 1 foot is about the length of feet.

In the ancient time, the concept of zero is not available. People would just say nothing, which slowed the pace of mathematic improvement.I think the depress of my father have spread on me, don't feel like writing, this boring post.