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Detailed explanation-1: -Sullivan had just reached an extraordinary milestone, becoming the first woman to visit Challenger Deep. And thanks to her time as a shuttle astronaut in the ‘80s and ‘90s, she’d now traveled 250 miles above the surface of Earth, and seven miles beneath it – she now held a record as the world’s most vertical woman.

Detailed explanation-2: -Kathy Sullivan, America’s first female spacewalker, also became the first woman to reach the deepest known point of the ocean. Sullivan dove to the bottom of the Challenger Deep and safely returned in her submersible vessel on Monday, according to EYOS Expeditions, the company that operated her expedition.

Detailed explanation-3: -On 23 January 1960, two explorers, US navy lieutenant Don Walsh and Swiss engineer Jacques Piccard, became the first people to dive 11km (seven miles) to the bottom of the Mariana Trench.