Member Cynthia sent us an interesting link to the historic flight of the Graf Zeppelin over the North Pole. In 1931, the ship silently carried a team of international scientists through the frozen air of the furthest reaches of the globe. In addition to all the scientific equipment, the flight also had pounds and pounds of mail aboard. There were two separate pick-ups of philatelic pieces totaling around 50,000 mailed collectibles. I love the special stamps and cancels used. What a smart way to commemorate such an expansion of knowledge and human ingenuity. I can't wait to get one from Mars.