to push planets out of orbit like his Silver Age incarnation, and will be at least disorientated if not outright hurt if forced to confront a nuclear explosion. Clark also spends some years traveling the globe trying to find himself after leaving Smallville and before settling in Metropolis, performing various low-key rescues before a crashing plane forces him to make a more public debut. Other differences include Lex Luthor as a business mogul with secret criminal dealings rather than a supergenius scientist who is a known crook to the public; both of his parents alive and well in the present; only green kryptonite existing (until the mid 2000s) and Superman thinking of himself as Clark Kent first, with "Superman" being a persona he adopts to preserve his privacy. Nuances in the characters mythos were later defined in various Superman origin stories, such as Superman: Birthright, where Mark Waid retooled Superman's origin in 2003. The trend continued after Infinite Crisis; when Superman's backstory was retooled once again by Geoff Johns, with Superman: Secret Origin in 2009. The single-Earth continuity retained the dichotomy of a good and evil Superman by introducing an alternative version of Superman's Earth-Three double, Ultraman in the Antimatter Universe surviving the Crisis, as presented in JLA: Earth 2. Alternative Supermen were also depicted using literary devices such as time travel and "Hypertime". The subsequent sequel to Crisis, titled Infinite Crisis, would see a brief return of the Golden Age Superman, Kal-L as well as the teenage Superman of a world without heroes, who survived the original Crisis. The modern take on the Superman Blue/Red was a controversial storyline in which Superman develops energy-based powers while losing his original powers, and acquires a corresponding new costume. He eventually splits into two versions of the energy-Superman, known as Superman Red and Superman Blue, before the two Supermen manage to find a way to work together and merge back into one entity. Due to the events of Infinite Crisis, as revealed in the subsequent weekly series 52, a new multiverse consisting of 52 alternative Earths was created, with most worlds featuring new alternative depictions of Superman. This backstory was kept intact for over a decade until it was revised in Superman: Birthright (2003) by Mark Waid, and then further modified following the events of Infinite Crisis (2006), with the essence of the changes being elaborated on in the subsequent "Superman: Secret