Ecologist Chris Morgan visits a remote peat swamp forest holding the most sophisticated orangutan culture on Earth, and an orphanage for the apes' young.
2011
2007
2012
2018
2020
2008
1994
2015
1988
1967
2016
2019
2005
2009
2002
1999
2021
2001
2024
N/A
2023
2017
2022
1983
1974