Glacier Cave-In
Broadcast: February 5, 1958
Added: Aug 11 2016
The frontiers of exploration aren't closed today. We often think that they are, but the truth of the matter is, there are still many new explorations to be made. Some through a microscope, some with a satellite exploring the heavens, some with a deep sea diving bell, and others right here on the good old, solid earth. Yes, the surface of the earth has many places still to be explored...