the largest part of the earth. The sea can be as remote as the moon, and much of what takes place beneath the waves is beyond our notice. Yet don’t forget the two armies I mentioned—the Chinese and Spanish. Those disappearances took place within the context of modern civilization. And if tens of thousands of Mayans fell victim to the ancient enemy whose existence I’ve theorized, then that was a case in which entire cities, hearts of civilization, were attacked with frightening boldness.” “You think it could happen now, today—”