A Student Split Open a Rock — and Found Something Buried for 52 Million Years
A groundbreaking find sheds light on an ancient predator and Wyoming's prehistoric ecosystem.
The Discovery Happened in Wyoming’s Green River Formation
It Was Found by a High School Student
The Fossil Was a Giant Gar Skull
It Looked Almost Crocodile-Like
It Had Been Hidden for 52 Million Years
It Came From a Program With a Strong Record
It Was Bigger Than a Typical Student Find
It Helps Reconstruct an Ancient Ecosystem
It Shows Why Complete Fossils Matter
It Turned a Student Moment Into Scientific Evidence
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A summer field course in Wyoming turned into something far bigger than a student fossil hunt. In the Green River Formation, a California high school student taking part in the University of Chicago and Field Museum’s Stones and Bones program uncovered the remarkably complete skull of a giant gar fish preserved for 52 million years.
The discovery was reported by the University of Chicago in 2019, with Lance Grande of the Field Museum describing the formation as a site that repeatedly produces important fossils, including species new to science and specimens that reshape understanding of ancient ecosystems. This find stood out because it was not a small fish impression in stone, but the skull of a predator that would have been at least 8 feet long.