27K views · 1K reactions | 流 Today at all four Australian research stations in #Antarctica and the sub-Antarctic – Casey, Davis, Mawson and Macquarie Island – and at the AAD head office in #Tasmania, we celebrate Midwinter Day. 鸞 As tradition demands for this auspicious date in the Antarctic calendar, the team of 15 expeditioners wintering at Mawson research station cut through the metre-thick sea ice and created a sub-zero swimming pool. | Australian Antarctic Program | Facebook