National Geographic- Iceland River Challenge
1984
Antarctica: An Adventure of a Different Nature
1991
Coral Reef Adventure
2003
Tropical Rainforest
1992
Borrowed from Nature
2020
The Ghosts of the Great Salt Lake
2001
Feast of Predators
2004
Soul of the Elephant
2015
Climate Change: The Facts
2019
March of the Penguins
2005
