The study did not count rats directly; instead, it analyzed rat sighting complaints submitted by city residents.

A new study finds that rat infestation in many of the world’s cities appears to be soaring, especially in Washington ...

New York City is getting rattier, thanks to climate change. That’s a takeaway from a new study, which found cities that ...

The city of Amsterdam is one of 11 where climate change is considered to be having an impact on the rising rat population.

named " NYC rat pack.” It's an uphill battle. “As our cities warm, urbanize and (increase in) density, we create more resources for rats which could result in further increases in numbers ...