A team of underwater archeologists, maritime engineers, technicians and explorers are trying to do what's never been done before: document every inch of the debris field where the Titanic sank on April 15, 1912.

NBC News' Kerry Sanders is with the scientists aboard the Jean Charcot research vessel in the North Atlantic. On Thursday Sanders and Titanic historian Parks Stephenson's responsed to reader's questions about the research expedition.

Read the chat here: Kerry Sanders Q & A on the Titanic expedition

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