In 1911, long before NASA conspiracies, long before Photoshopped fakery, there was Roald Amundsen. He climbed your "ice wall", proceeded to the South Pole and took pictures. There was no "edge of the earth". US Admiral Richard Evelyn Byrd flew over the South Pole in 1928. There was no "edge of the earth". How do I know the earth is round? I've been on an airplane at 30,000 feet and looked out the window. The curvature of the planet can bee seen quite easily. That's more than enough proof for me. Also, it doesn't seem to matter where you are on the earth, including Antarctica, that this curvature is visible. If the earth were flat and you went up to 30,000 feet or more, there would be no horizon. Yet, no matter how far above sea level that you travel, there is always a visible horizon. Some average citizens have attached cameras to ballons and let them go, some reaching 100,000 feet. Guess what? They clearly show the curvature of the earth and a horizon. Absolute, positive, undeniable proof that the earth is a sphere.