The saying goes that Kansas City in August is hotter than two rats in a wool sock, but it turns out the rising temperatures ...

Scientists sorted through data from more than a dozen US and foreign cities to determine what is driving the increase in rat populations in urban areas.

There’s a saying that in a big city you are never more than six feet away from a rat. It’s an urban myth but scientists are ...

Winters are getting warmer and shorter as the climate changes. That's helping rat populations grow in several U.S. cities.

These tended to focus on single locations and “usually without a lot of hard data,” he told CNN. He and his team decided to change that. They requested rat stats from the 200 biggest US cities ...

Urban human populations are exploding around the world, and they’re wasting a lot of food for rats to find. As cities expand around their edges, they have to add new infrastructure, which rats ...