I was certain that the date of this article would be April 1.
http://www.cbsnews.com/news/longest-fossilized-poop-to-be-sold-at-auction/
http://www.cbsnews.com/news/longest-fossilized-poop-to-be-sold-at-auction/

I have to admit that I am curious about this. How the heck would poop ever become fossilized in the first place? For that matter lots of fossils look like they are of plant and animal material that wouldn't exist longer than about 2 days (if even that) without being eaten by scavengers or dissolved by bacteria.![]()

Take the freshly pooped out manure and bury it under mineral rich fine sediment/mud.
Prior to that, test any moisture/water to ensure that it is not very acidic.
Then check back, in about 15 lifetimes, to see if it has turned to fossil.
The dinosaur's excrement, that turned to fossil, probably got dropped at just the right place, by happenstance, and was soon covered up by natural means (mother nature).
Not all excrement becomes fossilized. It takes the right place with the necessary conditions.