Dangers at sea abound. Capt. Keith Colburn talks about how he manages the madness.
Make use of the things surrounding you in order to build a shelter and fire in the cold.
The production crew reflects on their Everest experience.
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.