To better manage groundwater, first understand it. Natalie Parletta talks to an Australian scientist about the dangers of over-exploiting an important resource.  Water hidden beneath the earth’s surface comprises 98% of the planet’s fresh water. On average, this groundwater provides a third of all total water consumed, and its preciousness is ever more palpable since Cape Town’s water crisis sent shock waves rippling around the world. https://cosmosmagazine.com/earth-sciences/to-better-manage-groundwater-first-understand-it