alt Hacker NewsI was noticing that when I grab and spin the globe, most of the river systems shown on the map disappear (as do the wind flow indicators). But a few major river systems still remain on the map.
In the United States, I thought it was interesting that the Missouri River (which starts in Three Forks, Montana) was chosen as that river. I assume the choice was because this is the longest river, but maybe not quite as well known as the Mississippi river perhaps. And I would guess that not everyone knows the Missouri starts in Montana.
When you let go of the grab, other rivers are redrawn. For the US, that includes the major river systems (including the other major contributors to the Mississippi), which makes sense.
Interesting visualization is all.
Where the Missouri and Mississippi meet, they each contribute roughly 50% of the water. The Mississippi was better known, so the Missouri became the "tributary" in name.
If the opposite decision had been made, the river would be even longer in the books.