In the early 1800s, Prussian geographer Alexander Von Humboldt and French botanist Aimé Bonpland launch an expedition to explore the Amazon region, including the Orinoco River, from Venezuela to the border of Portuguese Brazil.
1997
2003
2009
1988
1994
1963
2012
1992
1982
2004
2007
1993
2000
1980
1969
