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The butterfly effect: this obscure mathematical concept has become an everyday idea, but do we have it all wrong?

By Milad Haghani, Associate Professor & Principal Fellow in Urban Risk & Resilience, The University of Melbourne

In 1972, the US meteorologist Edward Lorenz asked a now-famous question:

Does the flap of a butterfly’s wings in Brazil set off a tornado in Texas?

Over the next 50 years, the so-called “butterfly effect” captivated the public imagination. It has appeared in movies, books,…

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