Ex-NASA astronaut Dr Kathy Sullivan became the first woman to walk in space and descend to the deepest point in the ocean.

Sullivan, 68, emerged from the submersible DSV Limiting Factor (LF) on June 7, 2020, after conducting a successful expedition to Challenger Deep, the lowest point of the Mariana Trench. Its depth is recorded at between 10,902 and 10,929 metres below sea level.

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