Dough Thost is an Australian glaciologist who has worked on Heard Island and is now heading for the Amery Ice Shelf, on the Antarctic mainland. His team will camp on a floating ice shelf, and use a hot water drill to melt a hole through 400 metres to the base of the shelf. After taking a sample from the ocean floor - another 700 metres further down - they lower a group of instruments into the hole which will freeze in and record data for the next few years... and help figure out one of the big unknowns; is the ice shelf shrinking or growing?
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