http://www.efluxmedia.com/news_Chaos_Theory_Scientist_Edward_Lorenz_Dies_At_90_16477.html
An emeritus professor at the Massachusetts Institute of Technology, Dr. Lorenz was both a mathematician and a meteorologist, who combined the two sciences in an attempt to accurately predict weather. Instead, he accidentally discovered the butterfly effect, which he presented in a study published in 1972 entitled “Predictability: Does the Flap of a Butterfly’s Wings in Brazil Set Off a Tornado in Texas?”
Further reading: http://web.mit.edu/newsoffice/2008/obit-lorenz-0416.html