Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lightless, desolate and lunar-like, the Earth's deepest point is located in the Pacific Ocean, at the southern end of the Mariana Trench. The Challenger Deep is named after the British survey ship Challenger II and its depth was first recorded during the 1872 1876 expedition. First manned mission into the depth of the abyss followed in 1960, when Swiss oceanographer and engineer Jacques Piccard and U.S. Navy Lieutenant Don Walsh became the first men to reach the depth of the ocean. Learn more about the Challenger Deep and expeditions to the extreme point of Earth in this book.
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