Why Did the Titanic Hit the Iceberg

• Because an Iceberg's Bulk is Underwater

  As much as 85% of an iceberg's bulk is underwater, and because of the strong currents that can push on the underside of it, it's not uncommon to see an iceberg moving against a strong wind. 

  Bergs are composed almost entirely of fresh water, and as the iceberg melts, its centre of gravity can change, causing it to roll over to a new possition. 

  The part of the newly exposed surface appears darker than the rest of the ice, and are known as 'blue bergs'. It's believed that the Iceberg Titanic struck was a blue berg, making it very difficult to spot at night.