Page "Butterfly effect" Paragraph 5

In 1898, Jacques Hadamard noted general divergence of trajectories in spaces of negative curvature.

Pierre Duhem discussed the possible general significance of this in 1908.

The idea that one butterfly could eventually have a far-reaching ripple effect on subsequent historic events first appears in " A Sound of Thunder ", a 1952 short story by Ray Bradbury about time travel ( see Literature and print here ).