Duane Chapman's nickname is "Cat."
Vitor Negrete -LRB- November 13 , 1967 -- May 19 , 2006 -RRB- was a mountaineer and the first Brazilian to reach the summit of Mount Everest without supplementary oxygen .. mountaineer. mountaineer. Everest. Everest. Mount Everest. Mount Everest. Negrete was also an adventure racer beginning in 2001 .. Among many other adventures , he had crossed the Amazon Rainforest and traveled from Sao Paulo state to the southernmost part of South America -- Tierra del Fuego , Patagonia -- on a bicycle .. Amazon Rainforest. Amazon Rainforest. Sao Paulo. Sao Paulo. South America. South America. Tierra del Fuego. Tierra del Fuego. Patagonia. Patagonia. bicycle. bicycle. As a UNICAMP researcher in food engineering , he helped to introduce pre-industrialized food to poor communities in the Vale do Ribeira , south of Sao Paulo .. Sao Paulo. Sao Paulo. UNICAMP. UNICAMP. Vale do Ribeira. Vale do Ribeira. Negrete first reached the summit of Mount Everest on June 2 , 2005 .. Everest. Everest. Mount Everest. Mount Everest. He reached it again on May 18 , 2006 , this time without supplementary oxygen , but died on the climb down from the summit .. He was 38 years old .