earth exploration & beyond, will humans find more about what they already know ?

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will the human kind ever be able to figure out what the earth holds inside its deepest seas by going there, or may find out what actually is at te center of t he earth or weather going to extremities of the the universe and find weather the black hole really exits or not ?? will the man kind ever be able to go beyond present limits !?? i say we will never be able to do all these things even if the earth remains stable and not get distroyed by an astroid for 1000s of years !! what do u think ?