Alex explained everything to the emperor. The time machine, the Compudahteslanikolamagnetic device, and, yes, the refrigerator.

  The emperor stroked his chin, “Speaking of this time machine, I can order my finest engineers to help you build a new one.” Alex listened and smiled. “But I have one condition: you must help us solve Rome’s greatest problem!”

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  “What is it? What is it?” Alex asked like a school kid.

  “Raw excrement!”

  “What’s that?”

  “Poo poo! People keep throwing it in the street. If you can solve this problem, I will help you get home.”