The Dark Matter Prairie

What the Instruments Were Never Built to See

The Ogallala Aquifer holds approximately 2.91 billion acre-feet of water beneath 174,000 square miles of eight states, from South Dakota to the Texas panhandle. That volume would fill Lake Erie three times over. It underlies 27 percent of all irrigated land in the United States and supplies 30 percent of the groundwater used for agriculture nationwide. …