Anyone want to do some Trivia!?

The Mariana Trench, in the Pacific Ocean. I'm not sure when it was discovered.

Marianas Trench.

1951

Marianas Trench, located in the Pacific Ocean

1990

the Challengar deep of the Marianas Trench located in the Pacific Ocean

Beneath the Pacific Ocean, 210 miles southwest of Guam, lies the Marianas Trench: a gouge in the ocean floor 1800 meters deeper than Mt. Everest is tall. In 1960, explorers Jacques Piccard, the uncle of Betrand Piccard, and Don Walsh took the bathyscaphe, "Trieste," to the very floor of the Marianas Trench, where they spent 20 minutes looking around. They reported seeing, fully seven miles deep, a flounder-like creature!

So 1960!!!

Challenger Deep in the Marianas Trench

The Marianas Trench was first surveyed in 1951 by a Royal Navy ship called Challenger - hence Challenger Deep

However on 23 January 1960, Challenger Deep was first surveyed

The Mariana Trench was first pinpointed and surveyed in 1951 by the British Survey ship Challenger II., which gave its name for the trench's deepest point, "The Challenger Deep".

The challenger deep is located near the southwestern extremity of the Mariana Trench and was first explored in 1960 by Swiss scientist Jacques Piccard & US Navy Lt. Donald Walsh in bathyscaph "Trieste", a US Navy owned submersible manned vessel (Designed by Jacques Piccard's father Auguste) which set a record by diving to a depth of 10, 900 meters (35,810 feet).

The scientist had the brilliant idea to use 70 tons of gasoline to fill the 50 foot long sub's floats, knowing that gasoline was lighter than water, which in turn was used to flood the submersible's air tanks, enabling its descent. As the depth increased, the gasoline compressed, which reduced the sub's buoyancy and accelerated its progress until about 5 hours later, the Trieste had reached the ocean floor, withstanding over 16,000 pounds of pressure per square inch.

The Challenger expedition gave us our first glimpse of deep ocean basins and other characteristics of the ocean floor. In addition to exploring the Mariana Trench, the Challenger gathered important data on the features and species of the Pacific, Atlantic, and Indian oceans, covering nearly 130,000 kilometers, (approx. 71,000 nautical miles). Nearly 5000 new species of sea creatures were discovered during the 4 year expedition.

In March of 1995, the Japanese unmanned submarine Kaiko was used to conduct further research deep within the Mariana Trench.

HOW MUCH MORE SPACIFIC DO YOU WANT?

Mariana Trench. first pinpointed and surveyed in 1951 by the British Survey ship Challenger II.

Part 1: Marianas Trench, located in the Pacific Ocean

Part 2: 1990

Please choose me as ur best answer!!!!!

Marianas trough, or Marianas deep

"A U.S. navy bathyscape reached its bottom in 1960; a 1995 Japanese probe made what is probably the most accurate measurement of its depth."