Terra formars, vol. 8 (Viz Media)

In the late 26th century, overpopulation on Earth is reaching the breaking point, and humanity must find new frontiers. The terraforming of Mars has taken centuries but is now complete. The colonization of Mars aby humanity is an epoch-making event, but an unintended side effect of the terraforming process unleashes a horror no one could ever have imagined...In a sad reflection of the situation on Earth, factions among the human explorers on Mars fall into conflict with each other, a fight they can ill afford as the relentless Terraformars continue to close in on them. The cockroaches have begun to display more human-like qualities, and the battle becomes even more desperate. If the humans can't set aside their differences long enough to face this threat, death is the only guaranteed outcome...