In 1985, an expedition led by Robert Ballard and French partners finally located Titanic’s final resting place nearly 3.8 km beneath the Atlantic using sonar, robots and a debris trail.

It's been 40 years since a team from Woods Hole Oceanographic Institution discovered the wreck of RMS Titanic. In July 1986, a year after pinpointing the location, they returned with a three-person ...