Stories of enemies who become friends, friends who become enemies, and the ever-shifting line between friendly and hostile territory. A priest who once covered up sex scandals for the Catholic church quits his job and joins the staff of a law firm specializing in suing the church on behalf of abuse victims. And, a scientist explains what parasites like the shark tapeworm have to teach us about living in hostile places where your hosts don't want you around.
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Photo: Umberto Salvagnin