Prove It

Summary
D.W. discovers a passion for science, but her explanations for questions like why the sky is blue don't sound right to Arthur.

Trivia

 * D.W. pronounced  exploratorium wrong in this episode.

Cultural references

 * The "NOVA" television program that Arthur and Buster watch is a real show. Not to mention the fact that it was from PBS (Public Broadcasting Service), the same company that provides Arthur.

Errors

 * When The Tibble Twins raise their hands, Tommy has Timmy's blue scarf and Timmy has Tommy's red scarf then in the next shot of the Tibbles they have their regular scarves again.

Production notes

 * This is one of the few episodes that show a real life TV show interlaced with the animation.

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