It may sound like a joke, but it is pure science. In Montana, paleontologists analyzed a coprolite—petrified excrement—from 66 million years ago and found a microscopic treasure: the feather of a primitive bird. This marks the first time a dinosaur's 'menu' has been recorded with such biological precision.

A Time Capsule from the Cretaceous

Scientists have uncovered an extraordinary piece of evidence: a feather measuring just one centimeter that survived intact inside the waste of a theropod dinosaur for 66 million years.

66 Million Years Ago

What is a Coprolite?

For those unfamiliar with the term, a coprolite is essentially fossilized dung. While it might seem unusual, these prehistoric remains are goldmines for scientists because they provide direct evidence of an animal's diet and the ecosystem it lived in, which bones alone cannot always reveal.

The Location: Hell Creek

The discovery took place in the Hell Creek Formation in Montana, USA. This region is world-famous among paleontologists as it contains one of the richest records of the end of the Cretaceous period, just before the mass extinction event.

How did this happen?

According to reports, the excrement underwent a rapid petrification process within the geological layers of Montana. This process acted as a biological shield, protecting the delicate structure of the aquatic primitive bird's feather from decay and pressure over millions of years.

This finding is considered disruptive because it allows researchers to trace a direct biological link between predators (theropods) and their prey right before the great extinction, providing a vivid snapshot of the ancient food chain.

Detailed information provided by: L'Humanité

💡 Reflection: Sometimes the answers to the greatest enigmas of evolution aren't found in the bones, but in what the animal left behind!