Exploration of Antarctica By mw2crazy Jan 17, 1773 Captain Cook Crosses Antarctic Circle Jan 27, 1820 Captain Thaddeus Bellingshausen made the first sighting of the continent Feb 20, 1823 James Weddell reached 74·25°S in the Weddell Sea Aug 17, 1840 Antactica was established as a continent by french and americans Oct 24, 1899 Carsten Borchgrevink landed men at Cape Adare Feb 10, 1909 Douglas Mawson reaches the South Magnetic Pole Dec 14, 1911 Roald Amundsen and 4 others dog-sledged to 90°S Jul 22, 1923 Roald Amundsen reaches the South Pole for the first time. Dec 24, 1923 The beginning of whaling in the Ross Sea. Nov 29, 1929 Richard Byrd flewn over over South Pole Feb 25, 1956 US aircraft lands at South Pole Mar 23, 1961 Antarctic treaty comes into effect. Jul 22, 1967 Conrad Shinn establishes a perminint station with runway Jul 22, 2010 James Ross aboard HMS Erebus and HMS Terror, reached 78·17°S Jul 22, 2010 Boerge Ousland crosses Antarctica unsupported