Access to this video is a
benefit for members through
Through the worlds of a religious faster, an ultra-marathon runner, a farmer and a young girl beating allergies, go deep into the world of the human gut, which processes the fuel our bodies need to keep going.
Explore the incredible universe inside each and every one of us. An examination of diverse personal stories from around the world reveals how our lives, passions and goals are powered by the amazing systems that define our biology as a species.
Dozens of your favorite THIRTEEN and PBS programs are available to watch on-demand on many popular platforms.
LIVE