Flight Plan: How Unmanned Aircraft Are Helping Scientific Research Take Off

The U.S. Geological Survey keeps track of how much water flows through rivers and streams across the country to help plan for shortages—or at the other extreme—brace for floods. But there are more waterways than the agency is able to track, so recently they added a new tool that will not only help them cover more ground, but help them learn more about this precious resource—all without ever touching a drop.