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Attacking a planet uses up all [[Resources#Bacteria|bacteria]], [[Colonies]], and [[Resources#Nanobots|nanobots]] and resets bacteria [[Upgrades|upgrades]]. Destroying planets unlocks new upgrades and features, such as [[Research#Colony Irradiation|colony irradiation]] or [[Research#Nanobot Production|nanobot production]].
A planet counts as destroyed if its remaining population has been reduced to 0. There is no limit to how many times the player can attack one planet to destroy it. However, it's not possible to attack a planet if the player cannot gain even one gene strand or if he has less than 1 bacteria.
Each subsequent planet increases in population and defenses.
