8. An Investigator Diving Into an Arctic Sinkhole
Found in: Eastern Antarctica. Price: not specified
A British scientist can be seen plunging into an Antarctic fissure in this old photograph. Antarctic crevasses, which are generated by the slow, continuous movement of Antarctic ice, can span miles and reach depths of several feet.
A Scientist Diving Into an Arctic Crevasse
This scientist and others can see layers of ice and snow from previous years when they descend into a crevice. These crevasses are really windows into the past since they may see the ice crystals of the glacier seen farther below.