Shells get broken down either via wave action or via animal feeding,” he shared, while brown sand is typically eroded rocks ... that is parrotfishes.” They poop out the sand.

But fossilized feces can resemble blobs or chunks of rock, and they are not always found near fossils of the animal that made them — which makes it hard for scientists to know where they came from.

To compensate, they eat their poop after its first trip through ... marking poos from rolling off the rocks where they are deposited. Most animals take about 12 seconds to poo Clearly, the world ...