
Imagine you are a scientist studying dinosaurs. You are out hunting for fossils that will tell us all about life at the time of dinosaurs, and so far, all you have found are dinosaur bones. Then, something really exciting happens. You find a huge coprolite, a magnificent specimen of dinosaur poo! It's a wonderful find, and a beautiful fossil and hopefully, you will be able to find out all about what the dinosaur which made it had been eating!

When I took this small piece of coprolite to show the children, their reactions were hilarious. At first, before I told them just what a coprolite is, they thought it was a rather beautiful piece of polished stone. When they found out it was a piece of dinosaur poo though, I was very pleased that it is now made of stone as it went sailing across the room. The children were horrified that they had been holding a piece of poo and, even though they knew in their heads that it was now stone, they were reluctant to touch it again. They were fascinated to discover that things like poo actually do become fossils though!

So, other than gathering snickers and gasps of horror, why is fossilised dinosaur poo important? Coprolites are one of the rarest forms of dinosaur fossil to be discovered. They belong to a group called 'trace fossils' and other types of fossils in this group are fossilised dinosaur vomit and cololites (dinosaur poo which hasn't yet been passed). Although fossilised dinosaur bones, especially skulls, may be more famous and romantic, such 'icky fossils' as the children called them, can tell us a huge amount about the life led by dinosaurs and the time when they lived.

Fossilised poo may be less glamourous than other types of fossils, but within these coprolite fossils, there are fossilised remains of what dinosaurs ate, which can tell us about what the diet of dinosaurs was like. These fossilised remains can also tell us about what the environment was like. Bits of bone, tiny fossilised marine animals, fur, plant matter (including seeds, pollen and plant stems), fish scales and other things dinosaurs ate may be contained in the poo. This not only tells us what dinosaurs ate but sometimes scientists can even tell what kind of dinosaur produced the coprolite. It also tells us what types of things were around for the dinosaurs to eat. On top of this though, there are insect remains which become trapped in the poo which scientists can study. From the larve of insects to the actual burrows of dung beetles, coprolite preserves it all! To find out more about dinosaur poo, click here.