Antarctica By addie435 Jan 1, 1773 Antarctica was discovered Feb 7, 1821 1st known landing on continental Antarctica 1840 Separate British, French and American expeditions establish the status of Antarctica as a continent 1899 Carsten Borchgrevink leads a British expedition 1901 Carsten Borchgrevink leads a British expedition 1901 Douglas Mawson reaches the South Magnetic Pole 1935 Caroline Mikkelsen, is the first woman to set foot on Antarctica when she accompanies her husband, a whaling captain. 1961 Antarctica treaty