gravity
A river is young if it has an oxbow lake. Erosion and deposits of soil cause crescent shaped oxbow lakes along a river and change the river's course.
the course changed because the consequences
With his superstrength alone, he would be able to change the course of a river. So, yes. Superman isn't real
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Please rephrase - the question is unclear.
what happened to the Mississippi river in 1812
When the river's velocity decreases, the suspended load particles settle to the riverbed due to gravity. This results in sediment deposition, which can cause the riverbed to build up and potentially change the river's course or create new landforms.
Erosion effects the Mississippi river by causing collapse in the banks of the river. Erosion also causes the river to change course slightly as the banks change.
Glaciers from the last ice age changed the course of this river and many others. Luckily we are currently in between ice ages by thousands of years.
It is said the Indus river valley was forced to move due to foreign invaders, but the most likely cause discussed today is caused by environmental issues. Probably a drought or other natural cause.
a large storm or beaver dams
Allopatric speciation.