The card above is a maxicard from an Australian postcrosser living in Victoria. The cancellation shows first day of issue, January 2008. According to Wikipedia, the Australian Antarctic Territory was claimed by the UK and placed under the authority of the Commonwealth of Australia in 1933. It is the largest territory claimed by any nation.
This card is a painting by Danielle Eubank, who traveled on an expedition boat to the Arctic Circle.
Cool that both cards arrived at around the same time!