A new study suggests that the Zambezi River, Africa’s fourth-longest, is 11% longer than previously thought, with its most ...

The record heights of these bridges are measured by deck-height, which means the vertical distance from the bridge deck to the ground or canyon/river valley below.

Long before Mars turned into the frozen desert you see today, water shaped its surface in dramatic ways. Rivers cut through highlands, lakes pooled inside craters, and floods tore open canyon walls.