The starting point of my research is to identify materials and processes referring to the idea of change and alteration, as tangible signs of time flowing. Therefore an artwork can be read as a clue or a piece of evidence, both of these terms deal with temporality. Changes and alterations can be part of the materials I use or they exist in the places where I’m investigating, like urban suburbs, or houses. The clue can take the shape of two, three or fourdimensional elements, including therefore the time. The found piece of evidence is meant like a track. My intent is to mark the existing connection between clues and evidence, formulating hypothesis that could lead to stories and memories. Memory is a central idea, metaphorically meant as geological memory and a  pedogenesis process. This mental attitude allows me to focus and deepen the attention on enviroments, thinking on every human act as producer of evidences to be investigated.