- Earth Revealed—Groundwater
Annenberg/CPB. This episode discusses the science and human impact on groundwater resources. Scroll to Groundwater video and click on the "VOD" icon to view. One-time free registration may be required.
- The Road to Ubar
February 22, 1998, NPR's Weekend Edition—Sunday interview with filmmaker and author Nicholas Clapp on his search for the lost city of Ubar, which had disappeared into a sinkhole in ancient times.
