In 1804, two American military officers, Merriweather Lewis and William Clark, were given an assignment by President Thomas Jefferson -- to explore the uncharted areas of the land known as "the Louisiana Purchase," a massive stretch of 8,000 miles from St. Louis to the Western Coastline. Lewis and Clark hoped to find a Northwest Passage, which ...
Originally broadcast on PBS, this science documentary from National Geographic investigates the miraculous machine that is the human body. Learn about the body's extraordinary capabilities through personal stories coupled with in-depth scientific explorations. Technological breakthroughs are shown concerning surgery, brain development, conception, ...
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