The is 36,000 feet deep the bottom is seven miles long making it the deepest place on earth. the challenger is called HMS challenger. The trench was measured by "sounding" which involves dropping a very long line with a weight at the end into a body of water. The most recent into the challenger it happened in 2012 by solo-diver James Cameron in the DEEP SEA challenger.Comments are closed.
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January 2018
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