This thirties era US Government film from Kansas State University chronicles the boom and bust agriculture on the High Plains. The first section of the film is devoted to the establishment of mechanized agriculture and how it contributed to crop productivity gains. The final section of the film recounts bleak dust bowl conditions, including the migration of displaced farmers. Full description.

The UC San Diego Webshaker is a live earthquake experiment conducted over the internet. The user can select a historic earthquake or design an earthquake by specifying the frequency, amplitude, and duration. The shake table delivers base motion to the test structure in the same way that an earthquake shakes buildings and other structures. A live video broadcast and precise measurements from sensors ... Full description.

This site features seven PBS programs from around the world that explore the delicate relationship between humans and the natural environment, and the necessity of achieving a balance between the two. Programs contain both text and video, as well as links to other information sources. In addition to the seven programs, the site also features a photo gallery, definitions and information about global ... Full description.