Science as a Quest

Pysicists are trying to find out how nature behaves; they may talks carelessly about some "utlimate particle" because that's the way nature looks at a given moment, but... Suppose people are exploring a new continent, OK? They see water coming along the ground, they've seen that before, and they call it "rivers." So they say they're exploring to find the headwaters, they go upriver, and sure enough, there they are, it's all going very well. But lo and behold, when they get up far enough they ...