The scientific
dissemination programme "En ruta con la ciencia" has been broadcast
since 2015 on Aragon television. In the chapter that we present here,
"Studying the past", we discover with Pilar Utrilla the importance of
the rock formations of the Ebro valley and the use of new technologies applied
to the study of prehistoric art. Manuel Martín Bueno will also talk about the
dating and conservation of underwater heritage.