Now researchers are shedding light on why brown rats are the undisputed winners of the real rat race. The new study suggests that they crawled off ships arriving in North America earlier than ...

Brown rats are the undisputed winners of the real rat race. New research suggests that they crawled off ships arriving in North America earlier than previously thought and out-competed rodent rivals – ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Brown rats are the undisputed winners of the ...