Abstract

The aliens threaten the Earth biologically, and their microbes are an imminent menace to the rest of the Earth's surface. This paper will take you through the advanced concepts of cellular automata (CA) models that simulate the theoretical invasion and spread of alien spores across the Earth under different conditions. The CA models are highly efficient with computational resources and are especially useful for representing complex time- and spatially dependent systems. Therefore, CA models are the best solution for describing the probabilistic patterns of invasion driven by topography, weather systems, and human activity. The model is formulated using parameters that represent microbial survivability based on hypothetical microbial biochemistry. Through simulations of the model, it has been demonstrated that the extraterrestrial spores most likely to be found are highly adaptive and therefore able to dominate organisms in regions with high moisture and low ultraviolet light. Moreover, the simulation results indicate potential incursions into the explosion of the microbial population and emphasize the necessity of containment measures. This study is relevant to the astrobiological risk analysis and planetary defense program, as it suggests strict monitoring protocols at strategic locations to counter biosecurity risks in real time if indications of Earthly-adapted microorganisms are observed. The second research direction is the increased modeling and scenario construction with the inclusion of multi-agent systems.