An abominable reality of monstrous cruelty where only savagery is rewarded. Earth 40 is ruled by the unstoppable and merciless Society of Super-Villains, a group of super-villains that raped and pillaged their planet without opposition until being caught in an incursion with Earth 20 and its Society of Super-Heroes, who they would engage in a brutal five-year war with.
- Earth 40 is opposite Earth 20 in the structure of the Multiverse.
- Earth 40 is one end of the "Pulp Axis" in the local Multiverse with Earth 20.
- Earth 40 is part of an area in the local Multiverse termed "The Gloaming" with Earths 3, 10, 13, 15, 19, 37 and 43.
- Characters from Earth 40
- Other things related to Earth 40
- Earth 40's Comic Appearances
- Reality Gallery: Earth 40