How can Nexus be the Oracle? On a hardscrabble colony world, Nexus tracks a mysterious rat outbreak to a shy tortoise-like alien, who calls him Oracle. If his addled visions amount to fortune-telling, Nexus can't read the tea leaves. He foresees alien crocs ravaging Earth and enslaving humanity. Another vision depicts him happy in love. How to evade human extinction and win the girl is unclear. Word leaks that Nexus...