In the classic fable, the city mouse and the country mouse debate the relative merits of their respective lifestyles. The city mouse extols the virtues of a life of luxury and abundance, while the country mouse praises the peace and tranquility of the countryside.

But what if there was a third option? What if there was a way to combine the best of both worlds? That's the question that biologist Dr. Emily Hager is exploring in her research on urban mice.

Hager, who is an assistant professor at the University of California, Berkeley, has been studying urban mice for over a decade. She is particularly interested in how mice have adapted to living in close proximity to humans.

"Mice are incredibly successful animals," Hager says. "They've been able to adapt to a wide range of environments, from the tropics to the Arctic. But their ability to thrive in cities is particularly remarkable."

In cities, mice have access to a constant food supply, as well as shelter from the elements and predators. They also have the opportunity to interact with humans, which can provide them with additional resources and opportunities.

As a result of these advantages, urban mice have evolved a number of adaptations that make them well-suited for city living. For example, they are smaller than their country counterparts, which allows them to fit into tight spaces. They are also more aggressive and territorial, which helps them to compete for resources.

In her research, Hager has collected mice from homes all over the world. She has studied their genetics, their behavior, and their diet. She has also looked at how they interact with humans.

Her research has shown that urban mice are a distinct population from country mice. They have different genetic adaptations, different behavioral traits, and even different diets.

Hager's work is helping us to understand how mice have been able to adapt to living in cities. This knowledge could be used to develop new strategies for controlling mice populations in urban areas.

"Mice are a part of our urban ecosystem," Hager says. "They're not going away. But by understanding how they live, we can learn to coexist with them more peacefully."