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

Urban dwellers in Washington D.C., San Francisco, Toronto, New York City, and Amsterdam might have seen rats scurrying across their cities — and they're not imagining an influx. Rat populations ...

Rats like the built-up environment and being near people and their waste, the study and outside scientists said. They essentially eat at the same table as humans, multiple experts said.

FILE - A rat leaves its burrow at a park in New York City on Sept. 17, 2015. ( AP Photo/Mary Altaffer, File) ...