New research suggests that brown rats may have arrived in North America 35 years earlier than scientists previously thought, first appearing on the continent prior to 1740.
How brown rats crawled off ships and conquered North American cities yahoo.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from yahoo.com Daily Mail and Mail on Sunday newspapers.
New research suggests that brown rats crawled off ships earlier than previously thought and quickly out-competed rival black rats to take over North American cities.
How brown rats crawled off ships and conquered North American cities krqe.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from krqe.com Daily Mail and Mail on Sunday newspapers.