Those Who Walked Before: Fossil Footprints at White Sands

One of the most important archaeological discoveries of the last century, which rocked the field of archaeology and fundamentally shifted our collective knowledge of human occupation in the Americas.

On a warm winter day in 2005, while mending fences in the backcountry of White Sands National Park, David F. Bustos, the park's biologist turned resource-program manager, spotted his first Ice Age human footprint. He initially ignored it as a print made from a modern cowboy boot, but it nagged him for years. As Bustos became adept at identifying the trackways of Ice Age megafauna, he could not shake the feeling that ancient humans had walked there too.

It turns out, Bustos was right.

With the expertise of archaeologist Daniel Odess, British geologist Matthew R. Bennett, and a vast team of researchers they uncovered what is now considered the longest fossilized footprint trail in the world. Preserved beneath layers of alkaline gypsum sand are the unmistakable footprints of early humans, evidence that rewrites the timeline for the initial peopling of the Americas and is arguably the most important archaeological discovery of the last hundred years.

Those Who Walked Before: Fossil Footprints at White Sands is the riveting, first-person account of this extraordinary scientific journey that recounts in vivid detail the excitement of an evolving and ongoing research program complete with dramatic discoveries, disheartening failures, and significant impacts that have shifted our collective knowledge of Indigenous America.

Author: Matthew Bennett,David F. Bustos,Daniel Odess
Publisher: Unm Press
Published: 04/14/2026
Pages: 208
Binding Type: Paperback
Weight: 0.70lbs
Size: 8.90h x 6.00w x 0.80d
ISBN: 9780826369413

About the Author
Matthew R. Bennett is a geoscience professor from the United Kingdom. He is one of the world's leading authorities on vertebrate ichnology (the study of fossilized trackways), and he is the author of Our Dynamic Earth: A Primer.

David Bustos is the integrated resource-program manager at White Sands National Park, where he has investigated ancient human and megafauna footprints throughout the park for more than a decade.

Daniel Odess is an archaeologist with extensive experience conducting research in Alaska, northern Canada, and arctic Russia. He is a coeditor of Honoring Our Elders: A History of Eastern Arctic Archaeology.