Individuals responsible for notable and significant efforts to search for geographical information.
This category is about the historical personas Meriwether Lewis and William Clark, and their journeys. It is not the place for contemporary tourist information on the Lewis and Clark trail. Please submit such sites to the appropriate /Regional/North_America/United_States/Travel_and_Tourism/ subcategory.
History of all nations' programs for exploring space. For information on specific programs or missions, please also see /Science/Technology/Space/Missions/.