Exploring Expedition

America's first frontier was not the West; it was the sea, and no one writes more eloquently about that watery wilderness than Nathaniel Philbrick. In his best-selling In the Heart of the Sea, Philbrick probed the nightmarish dangers of the vast Pacific. Now, in an epic sea adventure, he writes about one of the most ambitious voyages of discovery the Western world has ever seen - the US Exploring Expedition of 1838-1842.

In 1838, the U.S. government launched the largest discovery voyage the Western world had ever seen; six sailing vessels and 346 men bound for the waters of the Pacific Ocean. Four years later, the U.S. Exploring Expedition, or Ex. Ex. as it was known, returned with an astounding array of accomplishments and discoveries: 87,000 miles logged, 280 Pacific islands surveyed, 4,000 zoological specimens collected, including 2,000 new species, and the discovery of the continent of Antarctica.

The confluence of the Green and Colorado Rivers, now in Canyonlands National Park, near popular tourist destination Moab, still cannot be reached or viewed easily. Much of the surrounding region remained remote and rarely visited for decades after settlement of other parts of the West. The first US government expedition to explore the canyon country and the Four Corners area was led by John Macomb of the army's topographical engineers.