Who spilled the first blood?
PC: GraceCheongg In the Bible, the book of Genesis, Cain killed Abel because of his jealously towards Abel that his sacrifices to God were accepted. That marked the first murder in the Bible, also believed to be the first murder in human history. If that is true, this story is probably also analogous to the first kill of our close sister species, the other primates that once roamed on the same planet Earth with us. I am a geologist and had the chance to visit several prehistoric sites of primitive human and primate-like species. Most of the caves were decorated with paints of hunting and herding, and most of the caves show signs of system...