challenger abyss

How do we measure the deepest places on Earth?
How does science determine this is the deepest point on the Earth, as well as measuring the depth there?
The first woman down to the deepest point on the planet
Former NASA astronaut, the first woman to walk in space, achieved new achievements when down to a depth of 11,000 m.
American explorer dives into the deepest ocean trench in the world
An American explorer successfully performed the deepest dive by submarine to the bottom of the Mariana ocean trench and found nylon bag shell.
China heard the sound from the Mariana crevice
China Ocean News said researchers from Northwest Polytechnic University in Shaanxi Province performed experiments near the Challenger abyss.
Discovered in the abdomen the 'living thing' in the deepest part of Earth
Recently, scientists from Newcastle University (UK) have discovered extremely surprisingly about marine life living on the deepest ocean on Earth (up to now).