"Titanic: 104 Years Later"

Tonight at 11:40 P.M. will mark the 104th anniversary of the RMS Titanic hitting the iceberg that full up  four of the her compartments with water giving Titanic just 2 hours and 40 mins before sinking.  The sinking of Titanic was a shook around the wourld mostly because everyone called it "the unsinkable Titanic." With all I've read on her I wanted to learn more about not just the sinking but why and  could more lives been saved that on cold night in 1912?