This title gathers a series of short unrelated essays, originated from a course on history that the author gave to design students. These essays share a common theme, which is the main tool that historians use to carry out to approach any theme: time. The reflections that arose in the lecture hall revealed the need to address the past, which leads to realize that many of the phenomena that seem modern are not, as well as to refer to the past in order to be genuinely innovative and modern, through the questioning and reinterpretation of what has already been done.