How do rivers form and where do they flow?
Water's Downhill Promise
How do rivers form and where do they flow?
Every river is a long, patient traveler with one rule it never breaks: always go downhill. From a trickle high in the hills to a wide, lazy mouth at the sea, a river is really just water keeping a promise to gravity. Let's follow one from the very beginning.
It starts with rain, or with snow melting in the spring. Water lands on high ground and can't sit still — gravity tugs it downward. So it slides, drips, and gathers into the tiniest threads of flow, no wider than your shoelace.
