Abstract
One of time's most puzzling aspects concerns its ontological status: on the one hand, it is a subjective and relative notion, based on our conscious experience of successive events; yet, on the other hand, our civilization and technology are based on the understanding that something like objective, absolute Time exists. Some philosophers have taken this paradox so far as to conclude that time is unreal; others, accepting the existence of absolute time, have engaged in heated debates regarding its structure, be it linear or circular, bounded or unbounded, dense or discrete.