Explained: What is Challenger Deep, the deepest spot in the ocean?
News: Kathy Sullivan, known as the first American woman to walk in space has also become the first woman to reach a Challenger Deep. Facts: Challenger Deep: It is the …
Read MoreNews: Kathy Sullivan, known as the first American woman to walk in space has also become the first woman to reach a Challenger Deep. Facts: Challenger Deep: It is the …
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