COSMOS IN A BOTTLE

摘要

Take a look at water running in a sink and you'll see an intriguing everyday phenomenon. As water from the faucet strikes the basin, it will create a small saucer of moving water. The water entering this saucer from above flows smoothly and radially out; its even flow creates a ring of ripples which holds the more turbulent water in the rest of the sink at bay. Outside the ring, the water is full of waves and eddies, but on the inside, the water is moving out too fast for the ripples to penetrate - no information from the rest of the sink can cross into the circle.