Question

Is the river really still?​

Answer 1

Answer:

So-called underwater rivers have been discovered in different spots around the globe. In the Black Sea, researchers uncovered an underwater river, but one that cut deep into the seafloor, much as rivers on dry ground wind through a landscape.

Answer 2

Explanation:

Yes still river are there ,They kept the merger a secret until the last minute, so the employees who were laid off felt they'd been sold down the river. This expression, dating from the mid-1800s, alludes to slaves being sold down the Mississippi River to work as laborers on cotton plantations..

Hope its help..