To further ensure that their species survive through eternity, especially when confronted daily by successful predator species that range from foxes to bears to humans, rodents are phenomenally quick breeders. Most species reach sexual maturity within a few weeks after birth, and if left to their own devices, rodents begin reproducing right away. As though driven internally to pass on their genetic blueprints to future generations, rodents typically produce large litters and often find themselves caring for two or three generations just weeks apart in age.
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