History is full of examples of uncontrolled populations : release in Australia of a little colony of rabbits
which descendants has spread on all the continent; the east United States invasion by the bombyx’s
chenille escaped from a laboratory of Boston; the grippe waves which seams sleep during few years
before scouring the world and disappear again before making a new cycle.

 Some populations grow quickly in numbers, others disappear very fast, increase and decrease according to a regular periodicity or obey to strange attracts laws and chaos.


Growth law 
Verhust's equation 
Non linear metamorphose 
Order in chaos