Job was asked by God (38:16), “Hast thou entered into the springs of the sea? Or hast thou walked in the recesses of the deep?” Man, in previous centuries, considered the ocean floor as a shallow, sandy basin stretching from one continent to another. We now know of vast undersea mountain ranges. Deep trenches now are known to exist in all three major oceans. Extensive scientific studies have been conducted on the Marianas Trench off the coast of Guam. It is almost seven miles deep. As the late Jacques Cousteau said: ‘Were the crust of Earth to be leveled-with great mountain ranges like the Himalayas and ocean abysses like the Mariana Trench evened out-no land at all would show above the surface of the sea. Earth would be covered by a uniform sheet of water-more than 10,000 feet deep!” How did Job know about these “recesses in the deep,” when we did not discover them for millennia? A lucky guess?
From: In Defense of the Bible’s Inspiration by Bert Thompson, Apologetics Press (2003)