The foot-long pile of poop is a replica of a fossil of 65-million-year-old poo made by a Tyrannosaurus rex that was found Eastend, Saskatchewan. The original specimen will stay at the Royal Saskatchewan Museum.
The poo, known as coprolite, has tiny bone fragments in it which further proves that the Tyrannosaurus rex was a meat eater. Those bone fragmets are still pretty sharp, not worn down by stomach acid, which suggests that that meal didn't spend much time in the Tyrannosaurus rex's stomach.
What animal did those bone fragments come from? It's hard to say for sure but scientists believe they came from a young duck-billed dinosaur or a triceratops.