Engineered Cyanobacteria

During the late twenty-first century, huge populations of cyanobacteria were engineered for extended survivability and deployed worldwide in a last-ditch effort to stop the planet from becoming uninhabitable to humans.

While the effect of this sudden influx of organisms is difficult to grasp, it may have been responsible for the oxygen boom that supported arthropod gigantism and as a result shaped the ecosystem of the Second Carboniferous.