Eye See's Fruit & Circles... oil on canvas
When an apple falls towards the Earth... ever so slightly the Earth falls towards the apple. Gravity is the black-hole in man's understanding of his multiverse. What is gravity? No-one knows the answer to what actually is the force... if that's what it is... that holds the universe together. Imagine if you will, standing on the rim of the Grand Canyon and not knowing what is a river. You may know what the river does but you don't know what it is... that is where gravity stands. A huge chasm cut deep into the the cosmos... cosmos means the universe seen as a well-ordered whole... but it is well ordered... maybe... but by not knowing what gravity is how can we why or how we got here... unless of course you are a Christian.
“Oh, Eeyore, you are wet!” said Piglet, feeling him. Eeyore shook himself, and asked somebody to explain to Piglet what happened when you had been inside a river for quite a long time.” AA Milne
“Have you also learned that secret from the river; that there is no such thing as time?" That the river is everywhere at the same time, at the source and at the mouth, at the waterfall, at the ferry, at the current, in the ocean and in the mountains, everywhere and that the present only exists for it, not the shadow of the past nor the shadow of the future.” Hermann Hesse
It doesn't really matter whether we are talking about the Colorado River, The Nile or the Murray... these rivers are like gravity... it doesn't travel but it is just everywhere and affects everything.