Dr. Robert D. Ballard explores the wreck of the Britannic, a hospital ship and sister-ship of the Titanic, which sank after a mysterious explosion during World War One.
Titanic's Lost Sister
In 1995, an expedition led by Dr. Robert D. Ballard discovered the wreckage of the Britannic, the Titanic's sister-ship, which had sunk mysteriously while serving as a hospital ship during World War One.
