Greenland, one of the last truly wild places, contains a treasure trove of information on Earth's early history embedded in its pristine landscape. Over numerous seasons, William E. Glassley and two fellow geologists traveled there to collect samples and observe rock formations for evidence to prove a contested theory that plate tectonics, the movement of Earth's crust over its molten core, is a much more ancient process than some believed. As their...

Examines the challenges geologists and earth scientists face while studying underneath the surface and reasons why the work is important, and discusses working conditions, survival techniques, and the technology they use.