12,000-year-old footprints found in White Sands National Park in New Mexico are the longest trackway of human footprints ever found and they tell the story of an Ice Age adult, a child, and an encounter with a sloth. 

Click above to hear part 4 of Feet Don’t Fail Me, featuring David Bustos, Chief of Resources at White Sands, National Park, New Mexico, and Sally Reynolds, Paleontologist at Bournemouth University, U.K.

Illustration by Karen Carr for nps.gov.

Feet Don’t Fail Me:
Part 1: Daniel Lieberman / Walking Barefoot
Part 2: Madhusudhan Venkadesan / Walking Strong
Part 3: Jeremy DeSilva / Walking Tall
Part 4: David Bustos & Sally Reynolds / Footprints in the Sands of Time

Podcast also available on PocketCasts, SoundCloud, Spotify, Google Podcasts, Apple Podcasts, and RSS.

2026 Webby Award Nominee
for our three part series on the 20th anniversary of Hurricane Katrina

Big Picture Science is an immersive radio show and podcast that reveals the unexpected connections in science.

Our Skeptic Check episodes take a critical look at extraordinary science claims and pseudoscience.

Don’t settle for a science snapshot. Get the big picture. 

Hosted By

Molly Bentley Executive Producer and Co-Host, Big Picture Science  

Seth Shostak Producer and Co-Host, Big Picture Science
Senior Astronomer, SETI Institute

Latest episodes