 The debut of the "Superman" newspaper comic strip in 1939 delved into further details about Krypton, introducing the idea that all Kryptonians possessed a level of heightened physical abilities, including super-strength and super-speed.In the early comics' version of Krypton, Superman's parents were named "Jor-L" and "Lora" (changed to the more familiar "Jor-El" and "Lara" by the end of the 1940s).The Golden Age Krypton would be revised into another form almost as soon as it was defined (see "Krypton in transition" below), and very few stories were initially written about it.