<prompt> Pedzisa mutsara unotevera: Boka rezvesayenzi, rakaumbwa nevamwe vevarume vakakurumbira zvikuru muminda yavo, raisanganisira vamiririri vanobva kuUnited States, Denmark, Norway neFrance, pamwe chete nevanobva kuBritain neUmambo hwayo. Vaviri bedzi, zvisinei, vakanga vane ruzivo rwomunguva yakapfuura rwepolar: Alistair Forbes Mackay, mukuru wezvokurapa wenzendo, akanga ashanyira Antarctica naSir Ernest Shackleton  <response>: Nimrod rwendo muna 190709, uye akanga ari mumwe weboka revatatu kuti awane nzvimbo yeSouth Magnetic Pole. Mumwe murwi mukuru weNimrodhi, James Murray ane makore 46 okukura, akanga ari muongorori womugungwa waStefansson. Pakati pesayendisiti vaduku paiva naWilliam Laird McKinlay 18891983, mudzidzisi wesayenzi ane makore 24 okuberekwa wokuGlasgow uyo akakurudzirwa nomufundisi wokuScotland William Speirs Bruce, uye Bjarne Mamen 18931914, shasha yokutsvedza makore 20 okukura yokuChristiania, Norway, uyo akagamuchirwa somuchengeti wemiti, pasinei nokushaikwa kworuzivo rwesayenzi. 