These lab-made waterfalls stuck around for about 20 minutes before ... river's life span, according to the study.The authors concluded that some (but not all) waterfalls in nature might form ...

According to a study published yesterday in the journal Nature, some waterfalls might not require an outside force, like tectonic movements or glacial activity, to form ... of a river—a finding ...

One side streams over the rocks like a normal waterfall ... but rhyolites never form lava tubes. Basaltic lava does, but those rock layers are far below the river bed and of the wrong type ...