The sandworm of Dune would not cross water; water poisoned it. Yet water had been known here in prehistoric times. White gypsum pans attested to bygone lakes and seas. Wells, deep-drilled, found water which sandtrout sealed off. As clearly as if he’d witnessed the events, he saw what had happened on this planet and it filled him with foreboding for the cataclysmic changes which human intervention was bringing.
