Treasure-hunter Bob Evans has spent half his life dreaming about the SS Central America, a pre-Civil War steamship decaying in the lightless depths off South Carolina. Now he’s returning to the shipwreck after 23 years. Evans, 60, set out this week with deep-ocean explorer Odyssey Marine Exploration Inc. (OMEX) to revisit the remains of the 19th-century sidewheel steamer, which sank in 1857 with the loss of 425 lives and an undetermined amount of gold. Despite recovery efforts in 1989 through 1991 that netted more than two tons of the precious metal, Odyssey says there may still be $86 million of gold lying more than ... (full story)