Until now, only two people have successfully made it to the bottom of Challenger Deep, the planet's deepest point at the southern end of the Mariana Trench. Vescovo is a Dallas-based co-founder of Insight Equity Holdings, a private equity fund, who is financing the Five Deeps Expedition as an attempt to explore the deepest points in each of the world's five oceans, BBC News reported. In an unexpected title that even Vescovo wasn't expecting, he is now also the first man to discover a plastic bag and sweet wrappers at the bottom of the world's deepest trench, according to BBC.
He spent four hours exploring the bottom of the trench in his sub, built to withstand the enormous pressure of the deep ocean.
"This was a demonstration of system reliability and operational efficiency never seen before in exploration of the oceans' deepest places", Walsh said. The last time Challenger Deep had a human visitor was in 2012, when Titanic filmmaker James Cameron set the previous record of 10,908 meters aboard his submersible, Deepsea Challenger.
During their descent, the expedition crew saw a number of sea creatures - a spoon worm at 7000 metres and a pink snailfish at 8000m - and believe they discovered four new species of crustaceans called amphipods, similar to prawns.
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Due to the small difference in measured depths between the Challenger and Horizon Deeps, Vescovo and team plan to find out once and for all if the Tonga Trench is actually deeper than the Mariana Trench.
He explained the expedition "took marine technology to a ridiculously higher new level by diving - rapidly and repeatedly - into the deepest, harshest, area of the ocean".
Down there he found unbelievable sea creatures, but also found a plastic bag and sweet wrappers.
"It is nearly indescribable how excited all of us are about achieving what we just did", said Vescovo in a statement emailed to IFLScience. Vescovo is planning to complete his historic expedition in late August when he dives the Molloy Deep in the Arctic Ocean.
Video clips by the Atlantic Production of Vescovo landing on ocean soil do point out an unidentified object in an otherwise barren-looking floor. The group is using a submersible called Limiting Factor to complete its challenge.