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## Revision as of 19:09, 27 February 2013

*Welcome to the explain xkcd wiki!*

We have collaboratively explained ** Expression error: Unrecognised punctuation character ",".** xkcd comics,
and only

**Expression error: Unrecognised punctuation character ",".**(

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**Add yours**while there's a chance!

## Latest comic

Chaos |

Title text: Although the oral exam for the doctorate was just 'can you do that weird laugh?' |

## Explanation

This comic pokes fun at the 1993 film *Jurassic Park*, which features a theme park filled with cloned dinosaurs. In the film, chaos ensues when all the dinosaurs escape and begin terrorizing their creators. The list of chaos topics, phase space, nonlinear equations, and strange attractors, comes directly from the movie, in which Dr. Ian Malcolm (portrayed by Jeff Goldblum), a mathematician and chaos theorist brought in to inspect the park prior to its grand opening, suggests that the dinosaurs' escaping could have been predicted based on mathematical chaos models.

Cueball explains that although he has also studied chaos theory, he has never seen where chaos models predict that dinosaurs would escape. Cueball's confusion highlights the contrast between the mathematical definition of chaos – shown in the graphs on the whiteboard – and its common meaning – a state of utter confusion or disorder (as illustrated in the film).

The whiteboard shows a bifurcation diagram of the logistic map (one of the simplest examples of the mathematical concept of chaos, also featured in what-if 105) and a dragon curve, which appeared on the section title pages of the novel *Jurassic Park*, upon which the film was based.

The title text references the scene in *Jurassic Park* in which Goldblum, as Malcolm, while making small talk with Drs. Alan Grant (portrayed by Sam Neill) and Ellie Sattler (portrayed by Laura Dern) during the helicopter ride to the park, responds to a remark with an odd-sounding laugh. The laugh has gained minor Internet notoriety after being used as the central sample in at least one remix.

The comic may be timely, as a remastered 3-D version of the film was released in April 2013, and a fourth film in the *Jurassic Park* franchise is scheduled for release in June 2015.

## Transcript

- [Cueball is staring at a whiteboard covered with equations and graphs. The dragon curve and a schematic of the bifurcation diagram of the logistic map (both famous figures from chaos theory) are visible.]
- Cueball: For two decades, I've studied phase space, nonlinear equations, and strange attractors.
- Cueball: And there is
*nothing*in here about dinosaurs escaping.

*Is this out of date? *
.

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