Arizona man finds hundreds of tracks predating dinosaurs on his property

One day when walking his property, this man noticed something he never expected to see.
Published: Nov. 8, 2024 at 2:36 PM EST|Updated: May 28, 2025 at 3:01 PM EDT
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(InvestigateTV) — Over 240 million years ago, groups of giant lizards that predated the dinosaurs walked across the Western United States.

Today, their journey and their footsteps are fossilized in Eastern Arizona.

James Lang bought his property without even visiting it in person after retiring from a law career in Chicago.

He was hoping for a peaceful retirement, but one day, on a walk, he noticed something sticking out of the wash with footprints.

“It had a front and a rear on it so I’m picking up, I’m looking, thinking this is amazing,” Lang said. “So I’m hauling this rock up, we’d walk a quarter mile. I realized there had to be more down there.”

So began the five-year journey of retrieving slabs of rock that preserved chirotherium tracks.

Reporter Mason Carroll got an up close look at the record-setting prehistoric prints.