The river is a thousand years old. The oldest water in it just came from the spr...

		rhn_mk1 on July 14, 2022 \| parent \| context \| favorite \| on: World's oldest tree still growing near the Norwegi... The river is a thousand years old. The oldest water in it just came from the spring a few days ago. Yet take away any water younger than a week, and the river is gone. How do you measure an age of a process defined by change?