This continuity exists in a multiverse alongside trillions of alternative continuities. The following are examples of retroactive continuities (or retcons). Critics such as Webster insist on the continuities that characterise change. Unicron is a fictional supervillain from the many continuities in the "Transformers" universe and toyline. Certain continuities can be traced through American history. As in other continuities, the loyalties of this version of Destro were suspect. Other scholars argue that there are significant continuities between ancient and modern homosexuality. He revealed what he considered its continuities with the antebellum era. The nature and origin of the Cylons differ greatly between the two "Battlestar Galactica" continuities. DDP also published comics in three alternate continuities. The term "DC Multiverse" refers to the collection of all continuities within DC Comics publications. Starscream is a fictional character in the many continuities in the Transformers franchise. Bumblebee is a fictional robot superhero in the many continuities in the Transformers franchise. He argued for understanding this period as one of continuities. Her mother's presence in her life differs between the three continuities.