I'm watching Unsolved History's episode on the worse naval disaster in history. It's not the Titanic. It's the Wilhelm Gustloff. The program hired people to run computer simulations and other naval architectural analysis. It was sunk by a Soviet submarine in 1945, while full of more than 10,000 German refugees. Over 8,000 people died. That's several times more than the Titanic. What's the most unsolved piece to me, though, is that this disaster is so unknown. Why?