Helen (Armstrong) Schreider (born May 3, 1926) and Frank Schreider (born January 8, 1924; died January 21, 1994) were explorers in the mid 20th century, known for traveling by amphibious jeep. National Geographic hired them after their first independent journey from Alaska to Tierra del Fuego (1954–56). They were the first people to travel the length of the Americas solely by means of their own power. They completed six additional expeditions through National Geographic, working freelance at first and later as foreign editorial staff, for fifteen years, from 1956 to 1970. They worked as a team and lived for periods of time in about 50 countries on five continents. Helen and Frank Schreider were known for their ability to write, photograph and film within the cultures they visited. They wrote three books, six major articles for National Geographic, and contributed to nine other books. They also made three separate nationwide speaking tours with their films. ( )