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Invasive species are reshaping the world’s ecosystems, but who’s to blame? Shane wrestles a python, hunts a wild pig, and gets sucker-punched by a carp to answer the question: in the age of humans, how does our species decide what belongs?

There’s a killer inside us. Our biology, culture, technology, and economy have transformed our species into the greatest predator the world has ever seen. From Yellowstone to Mozambique, Shane explores our global impact as the planet’s top predator.

Shane discovers why dogs are more than man’s best friend – they’ve been reshaped by evolution into the perfect partner for our species. And just as we’ve transformed them, dogs have left an unmistakable pawprint on us and the world we both share.

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.

In "The Urban Jungle," Shane explores the modern city: an ecosystem built by, for us. He encounters three species thriving in the city, reckons with our complex urban history, and envisions a new and wilder urban future.

Shane explores the history and science of cotton. A prehistoric coastline from North Carolina to Texas laid the foundation for a crop that re-shaped our history, our culture, and even our DNA.