
Episode 4 Preview
Preview: Episode 4 | 30sVideo has Closed Captions
Shane meets five species that made allies of humans.
Shane explores the surprising science and unexpected histories of “The Replacements”: five animal and plant species that made allies of humans, grew to dominate the planet alongside us, and changed their destinies (and our own) forever.

Episode 4 Preview
Preview: Episode 4 | 30sVideo has Closed Captions
Shane explores the surprising science and unexpected histories of “The Replacements”: five animal and plant species that made allies of humans, grew to dominate the planet alongside us, and changed their destinies (and our own) forever.
How to Watch Human Footprint
Human Footprint is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and Vizio.
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Surprising Moments from Human Footprint
Do you think you know what it means to be human? In Human Footprint, Biologist Shane Campbell-Staton asks us all to think again. As he discovers, the story of our impact on the world around us is more complicated — and much more surprising — than you might realize.Providing Support for PBS.org
Learn Moreabout PBS online sponsorshipWelcome to the age of humans.
We are not just talking about an ingredient.
We are talking about what we are.
A key phase in domestication is when humans take over the breeding process.
Every place that we inhabit is artificial intelligence.
One might say just stop eating chicken.
This is about replacing.
The Cat Tracking Device of the Future
Video has Closed Captions
Dr. Roland Kays uses a global GPS tracker plan to unleash the secret lives of wild cats. (3m 25s)
Video has Closed Captions
Shane meets with local Mexican chefs committed to reviving the sacred heritage of maize. (1m 30s)
The Top Secret Vault for Ancient Maize
Video has Closed Captions
Shane dives into Mexico's cornucopia with geneticist Sarah Hearne. (1m 30s)
Providing Support for PBS.org
Learn Moreabout PBS online sponsorship