Sir Douglas Mawson, Australia's greatest Antarctic explorer, made four trips to the Antarctic: in 1907-09 with Shackleton's British Antarctic Expedition; in 1911-14, having declined to join Scott's ill-fated Antarctic journey, as leader of the Australasian
Antarctic expedition; and twice between 1929 and 1931 as leader of the British, Australian and New Zealand Antarctic Research Expedition.
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