Why is the deepest part of the Mariana trench call challengers deep?

The deepest part of the Mariana Trench is called Challenger Deep in honor of the HMS Challenger expedition, which took place from 1872 to 1876. During this scientific voyage, researchers conducted significant oceanographic studies and made the first measurements of ocean depths. The name reflects the expedition's pioneering role in deep-sea exploration and its contributions to our understanding of the ocean's depths.