Skeleton is more often used to signify death, but there are other explanations. Skeleton is also a symbol for truth, and the underlying, or the general situation of human as he said, "under all the different skin colors and ethnic differences, etc., and bone is still the same ..
Combining the "truth" with the meaning of the fact that the bones that will last for a longer period than the rest of the body, and you get "hard truth".
Become a skull, separated from the skeletonm with a candle stuck in it, a symbol of black magic and seen the skull along with the books as a symbol Lu or knowledge of history. The traditional embodiment of death is the skeleton, carrying a sickle or scythe, and hence the Grim Reaper.
