Meanwhile, briskly unconcerned, the Nautilus ran at full propeller through the midst of these ruins. On February 18, near three o’clock in the morning, it hove before the entrance to the Strait of Gibraltar. There are two currents here: an upper current, long known to exist, that carries the ocean’s waters into the Mediterranean basin; then a lower countercurrent, the only present-day proof of its existence being logic. In essence, the Mediterranean receives a continual influx of water not only from the Atlantic but from rivers emptying into it; since local evaporation isn’t enough to restore the balance, the total amount of added water should make this sea’s level higher every year. Yet this isn’t the case, and we’re naturally forced to believe in the existence of some lower current that carries the Mediterranean’s surplus through the Strait of Gibraltar and into the Atlantic basin. And so it turned out. The Nautilus took full advantage of this countercurrent. It advanced swiftly through this narrow passageway. For an instant I could glimpse the wonderful ruins of the Temple of Hercules, buried undersea, as Pliny and Avianus have mentioned, together with the flat island they stand on; and a few minutes later, we were floating on the waves of the Atlantic. CHAPTER 8 The Bay of Vigo THE ATLANTIC! A vast expanse of water whose surface area is 25,000,000 square miles, with a length of 9,000 miles and an average width of 2,700. A major sea nearly unknown to the ancients, except perhaps the Carthaginians, those Dutchmen of antiquity who went along the west coasts of Europe and Africa on their commercial junkets! An ocean whose parallel winding shores form an immense perimeter fed by the world’s greatest rivers: the St. Lawrence, Mississippi, Amazon, Plata, Orinoco, Niger, Senegal, Elbe, Loire, and Rhine, which bring it waters from the most civilized countries as well as the most undeveloped areas! A magnificent plain of waves plowed continuously by ships of every nation, shaded by every flag in the world, and ending in those two dreadful headlands so feared by navigators, Cape Horn and the Cape of Tempests! The Nautilus broke these waters with the edge of its spur after doing nearly 10,000 leagues in three and a half months, a track longer than a great circle of the earth. Where were we heading now, and what did the future have in store for us? Emerging from the Strait of Gibraltar, the Nautilus took to the high seas. It returned to the surface of the waves, so our daily strolls on the platform were restored to us.