Lorenz, Edward N. -
American climatologist. He investigates climate models and the predictability of weather. He discovered the “Butterfly Effect” in which slight differences in a few variables in a computer model result in highly unpredictable results. Applying this concept to climate and weather in his famous 1963 paper, Lorenz argued that a butterfly flapping its wings in Beijing could, in theory, affect the weather thousands of miles away some days later.