Making 'Human Footprint': The Grind

"Human Footprint" is unlike any other science series, and it was no small feat to make. Our small crew spent 140 days in over 40 locations, and wrangled nearly 100 characters and experts. We filmed the extravagant and strange, the devastating and dire, the elusive and the abundant. In "The Grind," find out how making "Human Footprint" changed our team's minds and pushed our bodies to their limits.