This story appears in the April 2017 issue of National Geographic magazine. From India to Bolivia, it was always the women who knew exactly how much water their family needed. When photographer ...

This story appears in the August 2010 issue of National Geographic magazine ... thanks largely to their geology and water chemistry. In these flooded caves, such as Stargate on Andros Island ...

This story is part of a special National Geographic News series on global water issues. Rivers are the lifeblood of many plant, animal, and human communities. Yet many of the world's rivers have ...