Lecture video: The secret life of Antarctic sand

Dr. Kathy Licht of Indiana University-Purdue University presents an Augustana Center for Polar Studies lecture, "The secret life of Antarctic sand: Tales from the world's largest ice sheet."

Sand holds many clues to the Earth's past. The composition and age of single sand grains can be measured with high-tech analytical techniques and then combined with others to provide a rich history of the ice sheets in Antarctica.

This presentation describes where geologists go to collect these sand grains, how the sand's history can be measured and what this data means.