They travel around pop L.A. dropping in on clubs, visiting the Lakers at the Staples Center, where they encounter Steven Tyler, of Aerosmith.

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Stacy Small, President of L.A.-based Elite Travel International, spoke at Virtuoso Travel Week about how her business has quadrupled in the last 3 years because of social media.

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Wells's "The Time Machine" in 1895 to L. Sprague de Camp's 1956 "A Gun for Dinosaur, " time-travel stories often present headache-inducing puzzles and contradictions that can easily trip up the best storytellers.

WSJ: The Four Rules of Time-Travel Movies