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What happens to your poop after you flush the toilet? Hank Green's enthusiasm to explain is both awesome and disturbing.

Stashed in: Best Videos, Scatology, coolio, Microbiome, How It's Made, Smells!

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Humans have always peed and pooped, but where it goes after we’ve done our business has changed a lot. In fact: The water you just drank may well have been a part of someone’s urine just weeks ago! SciShow explains in the video above.

Reddit comments:     

that was great!!  and it was very informative!

i remember in high-school going to the sewage treatment plant and, aside from the horrid smell, being fascinated by the whole process.  we saw the clarifiers, skimmers, and sludge beds.  they even had a "chopper" that cut up what the sewerman called "rags" but what were mostly paper towels, baby wipes, and lady stuff.

the bacteria and protozoa are really our free workers, eh?!

i had no idea the final solid bi-products were turned into fertilizer.

i love it when he says, the waste water "needs to be disinfected before being released into the wild, also known as our drinking supply!"

That line about releasing the water into the wild tickled me, too.

And yeah, it's cool that they make fertilizer. Natural recycling!

And yeah, bacteria and protozoa are our free workers. They really make the whole system work. 

I try not to flush those things they call rags. 

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