'A race against time': how shipwrecks hold clues to humanity's future

New revelations about the 3m vessels scattered across the ocean floor, from Titanic to Shackleton's Endurance to the slave ship Clotilda, are not only rewriting our history but could determine our survivalAn immense railing, gnawed at by metal-eating bacteria for more than a century, emerged amid the pitch black waters. For more than two hours, the submersible had plunged through the water column to reach the depths of the Atlantic; now its lights bobbed over the prow of a ship dripping in red and orange icicle-like formations."My heart just started beating," says Bill Price. "It was just like 'Oh my God, this is amazing. This is the actual Titanic.'" Continue reading...