The water you're drinking may be thousands of years old – growing demand for deeper wells is tapping ancient reserves
- Written by Marissa Grunes, Environmental Fellow, Harvard University
Some of North America’s groundwater is so old, it fell as rain before humans arrived here thousands of years ago.Maria Fuchs via Getty ImagesCommunities that rely on the Colorado River are facing a water crisis. Lake Mead, the river’s largest reservoir, has fallen to levels not seen since it was created by the construction of the...