Pioneering canopy research in Costa Rica. 1986 December GEO Germany.
Indonesia's transmigration. 1986 June GEO Germany.
Summertime walk from Death Valley to Mount Whitney.
Bicycling in China. 1985 January GEO USA .
Vietnam veterans that stayed.
Exploring New Guinea's Waghi River.
Identical twins separated at birth. 1983 May GEO Germany.
The world's longest rappel. Mount Thor above the Arctic Circle.
Faith Healing in the Philippines.
Rwanda's mountain gorillas, the birth of ecotourism. 1981 December GEO USA.