as cotton shift in clash lo que nos erupt and glaciers grow and receiving the earth's crust is carved in numerous and fascinating ways leaving a trail of geological mysteries behind in the Marianas Trench deepest point on earth is explored its sheer walls cuts seven mile into the pacific ocean the mystery of what created this deep dark chasm take science detectives on some of the most dangerous. dives ever attempted into the abyss scouring the ocean floor scientists uncover a strange undersea world fire email.