http://news.bbc.co.uk/earth/hi/earth_news/newsid_8127000/8127519.stm
A single mega-colony of ants has colonised much of the world, scientists have discovered.
Argentine ants living in vast numbers across Europe, the US and Japan belong to the same inter-related colony, and will refuse to fight one another.
The colony may be the largest of its type ever known for any insect species, and could rival humans in the scale of its world domination.
While ants are usually highly territorial, those living within each super-colony are tolerant of one another, even if they live tens or hundreds of kilometres apart. Each super-colony, however, was thought to be quite distinct.
And according to the article, its probably the fault of humans, for carrying sub colonies of the original population throughout the world.
Genghis Khan, Augustus Ceasar and other potentates in history can only envy the extent that this ant colony has managed to spread across the world.