Undular bore and whelps near the mouth of Araguari River, Brazil. This image must be credited to USGS/Susan Bartsch-Winkler and David K. Lynch, via Wikimedia Commons: https://commons.wikimedia.org ...

A Minnesota Boat Club eight-man scull plies the waters of the Mississippi River on a training row in St. Paul early Aug. 19, 2009. (John Doman / Pioneer Press) Wondering how long the Mississippi ...

WARSAW, Sept 9 (Reuters) - The level of Poland's longest river, the Vistula, has fallen to a record low, the meteorological office said, leaving sandbanks exposed in Warsaw and water so shallow a ...

This is a painting that dates back thousands of years to Ancient Egypt. Artworks like this tell us a lot about the time and place that they come from. This painting shows a farmworker using a shaduf.