It is hard to explore the ocean because although we have the technology to capture air and store it so we can breathe from it (going into space), the enormous pressure the water provides the farther humans go deeper is so immense that we have to use a reinforced steel submarine, but its so small that the oxygen supply isn't enough to sustain people underwater for long. That is why it is difficult exploring the ocean.that is true
Well we haven't explored a lot. Mainly, under the crust and the bottom of the ocean.
The Triestes a Bathyscaph. In the 1960's I believe. But nothing has every been to the bottom of the trenches and came back.
The Pacific Ocean
in 1968
The least explored part of the Earth is the deep oceans, particularly the ocean floor. Only a small percentage of the ocean floor has been mapped and explored in detail, leaving much of this vast and mysterious underwater realm uncharted.
While there aren't really any parts of the world that have yet to be discovered, there are lots of parts of the world that are yet to be fully explored. The bottom of the ocean and many rain forests for example, have yet to be fully explored.
the artic
Challenger deep is in the ocean, it was never explored by spacecraft.
The ocean and the underground. Humans have not completely explored them yet.
Nobody actually knows. The ocean has never been explored to its fullest depths or lengths, neither has land. New life-forms are discovered almost on a daily basis. Mostly smaller creatures on land, but nobody knows what lurks at the bottom of the ocean.
Jacques Cousteau
what is wrong with this sentence "the bottom of the ocean is different from land masses because the ocean bottom is perfectly flat."