Many survivors have testified that they heard explosions AFTER the collision. Some say these explosions came from the boiler room. But I heard another theory that it was possible that a German U-boat could have launched a torpedo into the Titanic. Personally, I don't believe the scratch against the iceberg was enough to cause such large holes in the ship to make it sink. A torpedo, on the other hand, could. Is it not possible that the true answer to the sinking of the Titanic could lie in the shell of a torpedo sitting inside the sunken Titanic?