“Were it possible that the sea could be drained of its waters and emptied by some extraordinary accident, what incredible numbers, what infinite variety of uncommon and amazing sea monsters would exhibit themselves to our view, which are now entirely unknown!” wrote Reverend Erich Pontoppidan in his Natural History of Norway, published in 1753. Ninety-five percent of the ocean remains unseen by humankind, and it is believed that up to sixty-five percent of its plant and animal life has not yet been undiscovered.

Around noon on April 27, 1932, while aboard a steamship southeast of Florida, poet Hart Crane, intoxicated and still wearing his pajamas, jumped overboard. The ship’s captain later told Crane’s companion, Peggy Cowley, “If the propellers didn’t grind him to mincemeat, then the sharks got him immediately.”

“If ever a loss at sea fell under the definition, in the terms of a bill of lading, of Act of God,” Joseph Conrad wrote, “this one does, in its magnitude, suddenness, and severity; and in the chastening influence it should have on the self-confidence of mankind.” The sentence ends the first paragraph of his 1912 essay “Some Reflections on the Loss of the Titanic.”