Dangers at sea abound. Capt. Keith Colburn talks about how he manages the madness.
The production crew reflects on their Everest experience.
Make use of the things surrounding you in order to build a shelter and fire in the cold.
From the archives of Discovery: Watch as this rock climbing team navigates a path down a waterfall. Learn more about rock climbing.
From the archives of Discovery: With assistants looking on from above, a team of rock climbers begins a long descent. Learn more about rock climbing.
From the archives of Discovery: A rock climbing team reaches the bottom of a waterfall. Learn more about rock climbing.
From the archives of Discovery: Watch as a rescue helicopter and a bird interact with earth's largest ecosystem, the ocean. Learn more about the ocean in this video.
From the archives of Discovery: Explore these ancient cave dwellings, built into a canyon. Learn more about cave dwellings.