
UAV hovering over exposed Pleistocene reef on West Caicos Island in the Antilles prior to climbing to acquisition height (50 m above outcrop). The UAV is manually launched and then controlled by a combination of manual and automated radio signals. Photo by Chris Zahm.
Necessary resources such as oil and water lie below our feet. Research scientist Chris Zahm of the Bureau of Economic Geology talked to EarthSky about how today’s scientists are coming to understand the world underground, while exploring for resources in safe, practical and effective ways.









