How interfering humans helped Amazon diversity New Scientist - April 13, 2010
Pre-Columbian alterations may have increased biodiversity.
Lost Tribes Used Clever Tricks to Turn Amazon Wasteland to Farms Wired - April 12, 2010
"Lost" Amazon Complex Found; Shapes Seen by Satellite National Geographic - January 4, 2010

Ancient Amazon Cities Found; Were Vast Urban Network National Geographic - August 29, 2008
'Lost towns' discovered in Amazon BBC - August 29, 2008
"Uncontacted" Amazon Tribe Actually Known for Decades National Geographic - June 20, 2008
"Uncontacted" Tribes in Amazon National Geographic - June 7, 2008

Photos Spur Debate On Protecting "Uncontacted" Tribes National Geographic - June 3, 2008

"Uncontacted" Tribe Seen in Amazon National Geographic - May 30, 2008
Ancient amber shows rich Amazon life ABC - August 29, 2006
Fossilized Amber Wikipedia
Amazon Children "Spontaneously" Understand Geometry National Geographic - January 20, 2006
Tests with Amazon villagers hint at innate geometrical sense
Amazon 'stealth' logging revealed BBC - October 21, 2005
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