A reader asked The Dallas Morning News' Curious Texas project, "where does our poop and pee go?" It's a "serious question" added the asker, who goes by Teenage Moriarty.
The Dallas Morning News took the question seriously and toured one of Dallas’ wastewater treatment plants to find out the answer kids from 1 to 92 ask about and then giggle.
It’s true what they say. Poop really does roll downhill.