Why did the list suddenly change from 590s to 540s? <.<
595: Lethally irradiated zones so saturated with radiation that it lasts for over 200 years can only permeate an acre, and you can walk a few feet away for the radiation to become non-lethal, and then disappear.
596: Somehow the dead bodies had the presence of mind to place radiation warning signs around the perimeter of these lethally irradiated zones.
597: Vault 87 was constructed with with a strange, grey, void-like, physics-defying space connecting the main entrance to the rest of the Vault.
598: The original residents of Vault 87 were all selected from humans with a natural affinity for traversing this strange dimension to enter the vault through it's non-functioning door.
599: The Super Mutants who have succeeded the Vault 87 Dwellers have inherited the ability to traverse this nether as well and can walk through the sealed door too.
600: The Vault 87 Super Mutants possess the unique FEV mutational ability to shrink their index fingers at-will so they can fire rounds from Hunting Rifles.