American paleontologists have found fossilized feces in the skull of a fossil fish. This is stated in an article published in the journal Research in Paleontology and Stratigraphy.
Fossilized feces – coprolites up to 2.5 millimeters in diameter – were found in the head of the fish. According to scientists, they were produced by worms that ate the brain of a decomposing animal.
Analysis using X-ray spectroscopy showed that the worms' feces are rich in calcium and phosphates. The age of the find is about nine million years ago, it belongs to the Miocene epoch.