Lake Kariba lies between Zambia and Zimbabwe in southern Africa and is the world's largest man-made reservoir by volume - but it has recently been hit by severe droughts.
Throughout human history, civilisations have been named after the rivers along which they flourished: Indus Valley, Nile, ...
A reader asks if the renovations to the North Fork dam worked as intended, or if "too much" water was released after Tropical Storm Helene.
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