This session will present examples of attempts to exhibit huge spans of time. What media and exhibits are used to demonstrate great temporal distances, for example in dinosaur shows, history museums or archaeological exhibitions. Are the exhibition makers aware of the problem? Are the visitors interested or do they just want to get insight into the past, regardless of time spans? Can we expect all visitors to have the same perspective of time spans? From which age are visitors able to grasp such abstract notions? What do visitors actually absorb from installations illuminating time spans?