Nature can be described as self-managing in ways that are both extremely precise and chaotic. Imagine the landscape as a vast, living canvas in which every raindrop is a traveller seeking the lowest point of Earth. The process begins with a small trickle of molecules in freshwater, drawn by gravity. The trickles meet and whisper into the creeks and accumulate strength in streams before morphing into the massive giants called rivers.
To understand these waterways, you must look into their "watershed," which is the main drainage basin of nature. No matter whether it's a little valley or an enormous continent, the watershed makes sure that each drop of water that flows through an area will eventually find its way to a location, which is usually at the point where a river joins the ocean. These huge drainage zones create huge rivers that have changed the course of human history and have provided trade routes as well as sustained whole civilisations.
