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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 ...
Live Science on MSN

18 of Earth's biggest river deltas — including the Nile and Amazon — are sinking faster than global sea levels are rising

Worldwide, millions of people live in river deltas that are sinking faster than sea levels are rising, research suggests. This exacerbates the risk of catastrophic coastal flooding and land loss.