User blog comment:MeDeoPal/On the Origin of Titans and Shifters/@comment-2191382-20140903232540

But how do you explain the specific origins of the titans. For example what was Eren given to turn him into a titan. Personally I think the titans were not a government experiment but rather a simple research experiment. They created a fusion of various hominid based dna but it went wrong and what resulted was the titans. One of the researchers was an ancestor of Eren's father and that's why information about them would be in the basement.