Based on individual trends within cities, Washington was by far the leader in rat increases, followed by San Francisco, Toronto, New York City and Amsterdam.

It gives cities a better picture of the uphill task that they face,” said Jonathan Richardson, an urban ecologist at the University of Richmond who led the work published in ...

Mayor Eric Adams’ budget cuts prompted the Sanitation and Parks Departments to scale back cleanliness initiatives last year, causing some public spaces in the city to get dirtier, according to City ...

Global warming is worsening droughts, making sea levels rise, and fueling deadly storms. Now scientists have a new problem to add to that list: Climate change is helping rat populations thrive in U.S.

We are on our heels and being pushed backward,” Jonathan Richardson, the study’s lead author and an ecologist at the ...

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 ...

Simmering urban temperatures are bad for humans. It's another story for rats, according to new research -- especially in ...