Enigmatic Impact Event

Archaeological recordings dictate that just 800,000 years ago a meteorite ten meters in diameter, apparently composed of pure Warpstone, hit the earth in what is currently the Black Valley, right above a large mass of Uranium with high concentrations of U-235. This mass of fissile fuel became critical and a massive nuclear explosion followed. Radioactive fallout mixed with warpstone fallout spread throughout Australia, alongside some of Indonesia and New Zealand. This resulted in a heavily mutated ecology, which created an enormous number of distinct species. Homo Erectus populations are believed by mainstream scientists to have been eradicated by this event; in reality they also suffered from severe mutations and took refuge in Tasmania, which was left unscathed by a great war in the mainland. The time period following this impact is known as the Enigmatic Age.