The most widely held explanation about what happened to the Titanic was it sank after hitting an iceberg - but one theory suggests the 'unsinkable' ship was doomed before it even left port.
The RMS Titanic sank on its maiden voyage with 2,200 passengers from Southampton to New York in the North Atlantic Ocean on April 15, 1912.
A total of 1,517 people died in one of the deadliest maritime disasters in history.
