How long do mice and rats typically live?

Mice and rats have varying lifespans that generally range between one to two years under normal circumstances. The typical lifespan for common species, such as the house mouse, is indeed around one year in the wild due to predators and environmental factors. However, in controlled environments, such as homes or laboratories without predators, they can live longer, often reaching up to two years. The approximately one-year lifespan reflects the average conditions that these rodents face, which includes risks from disease, food scarcity, and predator encounters. While some species can occasionally live longer and specific conditions can extend their lives, a general expectation for their lifespan is around a year. Therefore, this choice accurately captures the typical lifespan for these rodents.