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Abstract
Considering geological time as an important epistemological obstacle to the construction of ideas on biological evolution, a study was carried out on the so-called ‘Darwin Papers’. The conclusion was that Charles Darwin's excursion in the Andes during March–April 1835 was a crucial step in this regard. An expedition was carried out in March–April 2002, in the exactsame days of the year that Darwin had been there. The results of this expedition are described; these suggest a reappraisal of the traditional Darwin iconography and teaching strategies.