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 over the wreck site, and the "Remora" ROV was caught in a piece of wreckage. This same year saw the discovery of the new bacteria living in the rusticles on the "Titanic", "Halomonas titanicae". Tourist and scientific visits to "Titanic" are still continuing; by April 2012, 100 years since the disaster and nearly 25 since the discovery of the wreck, around 140 people had visited. On 14 April 2012 (the 100th anniversary of the ship's sinking), the wreck of the "Titanic" became eligible for protection under the 2001 UNESCO Convention on the Protection of Underwater Cultural Heritage. In the same