Scientists have made an unusual discovery inside fossilised dinosaur droppings: a bird feather. These ancient droppings are 66 million years old. Researchers believe it came from a large predator. Seeing a feather in such good condition is very uncommon. This gives scientists a direct look at the dinosaur's diet. Evidence indicates the dinosaur consumed a feathered creature. The discovery may help us understand bird survival after the extinction. The details appear in a newly published study. It gives us a snapshot of ancient predator-prey interaction.