The Titanic was a massive ocean liner that was thought to be virtually(事実上)unsinkable. She was on her maiden voyage and carrying more than 2,200 passengers and crew when she struck an iceberg on April 14, 1912, and sank early the next morning. More than 1,500 people were killed as a result. In 1985, a team led by Robert Ballard and Jean-Louis Michel located(位置を突き止める)the Titanic's wreck(残骸)on the ocean floor(海底). The team made a discovery that shed light on how the ship sank.