The researchers also state that they're "confident that the early archeological sites from Brazil may not be human-derived but may belong to capuchin monkeys."
50,000-year-old stone tools found in Pedra Furada, located in the state of Piauí in north-eastern Brazil were made by monkeys. - HeritageDaily - Archaeology News
There is increasing evidence that anatomically modern humans (AMH) left Africa 100,000 years ago. Archaeological evidence indicates that AMH were in Arabia, China, Crete, and Brazil over 100,000 years ago. It has been shown that AMH left Africa before 60 thousand years ago.