Looks at cities of the Industrial Revolution in Great Britain and the ways in which they were transformed from dirty slums to a sanitized emblem of civic pride during the 19th century. [8:17]

Scientists are studying the condition of the Ogallala aquifer underneath Kansas farmlands, which use this freshwater resource for irrigation. They want to understand changes taking place and what the future holds, and to help develop a...

Where does your water come from? Join Ken, a hydrogeologist, and learn all about groundwater. [4:47]