Conservationists Jim and Jean Thomas braved the steamy jungles of Papua New Guinea to save a tree kangaroo from extinction and ended up providing water and sanitation to ten thousand people in one of the most remote places on earth.
1989
1956
1972
2001
1985
2013
2000
NaN
2017
2006
2023
2002
2011
2018
1973
2022
1992