Asthe100thanniversaryofTitanic’ssinkingapproaches,ateamofscientists,engineers,archaeologistsandimagingexpertshavejoinedforcestoansweroneofthemosthauntingquestionssurroundingthelegendarydisaster:Justhowdidthe"unsinkable"shipbreakapartandplungeintotheicywatersoftheNorthAtlantic