Despite such all-consuming coverage, one major player in the disaster is often overlooked - the iceberg that sank Titanic. Ice Engineer Claude Daley explains how icebergs change personality at sea.

This is not a scene from the 1997 film Titanic. On the evening of April 14th 1912, a small Canadian fishing boat, skippered by a French-Canadian captain called "Jacques-Chai", approached the Titanic ...