Beavers are known as ecosystem engineers, capable of transforming entire river systems through their dam-building behavior. By cutting trees and building dams, they slow down water flow and create ...

The Chinese government has said it's moving ahead with building a series of dams that will eclipse anything it has built before. The massive hydroelectric project will help the energy-hungry country ...

MAKUENI, Kenya — On a dry riverbed one recent sunny morning, residents of Kasengela village toiled away mixing cement and sand to make concrete. The sound of their shovels resonated through the valley ...