Rivers join downstream, flow downhill, and eventually meet an ocean or terminal lake: These are fundamental rules of how ...

"These hydrologic oddities illustrate how much we have still to learn about Earth's dynamic surface," researchers said in a ...

South America's Casiquiare River, for example, is a navigable waterway that connects the continent's two largest watersheds, the Orinoco and Amazon basins, by acting as a distributary of the ...

An example is the Casiquiare River in South America. It runs between the Amazon and the Orinoco, two vast watersheds. It flows into the Rio Negro after branching off from the Orinoco. After ...

Several million people depend on the Orinoco—the third-largest river in South America—for food, drinking water, fishing, tourism and transport. For more than 1,300 miles, the river flows from ...

Rivers start in mountains, join other streams as they flow downhill, then channel into an open ocean or lake. Right? Well, ...

Most rivers follow a few basic rules: they flow downhill, join other rivers, and eventually end up in the ocean or a lake. But a new study has found that not all rivers play by these rules. In fact, ...