Douglas Mawson, onye ndu na onye nhazi nke Australasian Antarctic Expedition, kpebiri iwere ya nkịta Greenland iri ise; o kwenyere na ọnụ ọgụgụ ahụ ga-akarị nke ga-ezuru ya maka njem sledge ọ na-eme atụmatụ ime n'afọ ọ na-eme atụmatụ ịnọ na Antarctica. Mawson kwadoro nkịta karịa ịnyịnya ibu n'ihi na, ọ bụ ezie na ha nwere ike ịdọrọ ntakịrị karịa ibu ahụ ha, enwere ike ịgbakwunye nri ha na anụ sitere na anụ ọhịa nke Antarctica na <unk> ma ọ bụrụ na ọ dị mkpa <unk> site na nkịta ndị ọzọ, yabụ na ha achọghị nnukwu mbubata nri nke ịnyịnya ibu chọrọ iji hụ ha site na njem. Ịnụ ọkụ n'obi nke nkịta ndị ahụ so ná Njem "Nimrọd" ahụ masịrị Mawson
mgbe o so Ernest Shackleton gaa Antarctica. Ma Shackleton ma Robert Falcon Scott nwere obi abụọ banyere uru nkịta bara karịa ịnyịnya ibu. Amundsen na onye ọsụ ụzọ Arctic Fridtjof Nansen bụ ndị nkwado na-anụ ọkụ n'obi ma chee na ndị nchọpụta Britain aghọtaghị etu esi eji nkịta eme ihe na mpaghara polar; Amundsen rụtụrụ aka na ihe ịga nke ọma ha na Northern Hemisphere na ịdị mfe nke ịgwọ nkịta ma e jiri ya tụnyere ịnyịnya ibu, ọkachasị na mpaghara ndị nwere nnukwu nkịta ebe enwere ike iweghachite nkịta dara ada mana a na-efukarị ịnyịnya ibu dara ada. Otú ọ dị, ndị Norway na-eji nkịta eme ihe n'ụzọ zuru ezu; ọ bụ ezie na ha nwere ike ịhụ ụmụ anụmanụ n'anya, e cheghị echiche nke ọma banyere nlanarị ha mgbe ha na-abaghị uru. Scott ejiriwo nkịta mee ihe ná Njem Nchọpụta ya, o wutekwara ya nke ukwuu mgbe a manyere ya igbu ha nile n'oge ọ na-eme njem ịnya ịnyịnya ígwè n'ebe ndịda. Ka o sina dị, àgwà ya n'ebe nkịta nọ yiri nke Amundsen na Mawson: