Wreck of the RMS Titanic research. The stern section, which had previously received relatively little attention from explorers, was specifically targeted for analysis. The microbial colonies aboard "Titanic" were also a key focus of investigation. The second expedition, from 27 May – 12 June 2004, saw the return of Robert Ballard to "Titanic" nearly 20 years after he discovered it. The expedition spent 11 days on the wreck, carrying out high-resolution mapping using video and stereoscopic still images. 2005 saw two expeditions to the "Titanic". James Cameron returned for the third and last time to film "Last Mysteries of the Titanic". Another expedition searched for
Wreck of the RMS Titanic on "Knorr"s screens. One of them was identified as a boiler, identical to those shown in pictures from 1911. The following day, the main part of the wreck was found and "Argo" sent back the first pictures of "Titanic" since her sinking 73 years before. The discovery made headlines around the world. Following his discovery of the wreck site, Ballard returned to "Titanic" in July 1986 aboard the research vessel RV "Atlantis II". Now the deep-diving submersible DSV "Alvin" could take people back to "Titanic" for the first time since her sinking, and the remotely operated vehicle (ROV) "Jason Jr."