The findings in natural sciences are becoming more and more complex. The things a person has to know about natural sciences in order to be able to participate in relevant discussions within society are becoming more and more demanding so that you cannot start to provide teenagers an insight into these worlds early enough. Volume 6 documents journeys through time with details of distances, speeds and curved space, and the becoming and decaying of the universes. Moreover, the existence of further universes is intended to encourage young readers and readers who are young at heart to reflect upon and promote their interest in the sciences.