Mike Horn (born July 16, 1966) is a South African-born Swiss explorer, polar adventurer, and environmental advocate. He is renowned for his solo expeditions in extreme environments, including the first unsupported solo crossing of Antarctica, the first solo descent of the Amazon River, and a circumnavigation of the Arctic Circle. Horn's adventures often highlight human endurance and the impacts of climate change. He founded the 'Pangaea Expedition' project to educate youth about environmental fragility. His feats have been documented in films and books, inspiring global audiences. Horn's career began after military training in South Africa, and he later moved to Switzerland to pursue professional exploration. He holds multiple world records and continues to advocate for ecological conservation through his expeditions.