  Paran\'a Ra'anga (the image of Paran\'a, in Guaran\'i) is the name of a
cultural and scientific expedition that traveled the rivers: R\'io de la Plata,
Paran\'a and Paraguay, from Buenos Aires to Asunci\'on, during March 2010. The
project brought together some forty scientists and artists from three countries
in a slow and enriching cruise, putting in active contact actors from different
backgrounds and disciplines -which usually run separately- in the framework of
an unusual space-time experience. The project recovers the historical tradition
of the trip as an instrument of knowledge and collaboration between the arts
and sciences, necessary to build new ways of seeing and understanding the river
and its banks. This article reports on the motivations of this project and its
projection.
