The Green River flows ‘uphill.’ Geologists think they finally know why.

This makes the story of how the Green and Colorado Rivers met so perplexing to geologists like Adam Smith at Scotland’s ...

The Colorado River's largest tributary flows 'uphill' for over 100 miles — and geologists may finally have an explanation for it

Millions of years ago, the Green River carved a path through the Uinta Mountains instead of flowing around the formation. Now ...