I do not know exactly what answer you are looking for here considering the fact that there are many differences between the actions of animals and humans. The best answer I would give is that people have a sense of what is wrong and right and decide based on a moral subconscious. Animals act on they need to survive and do not care about acting civilized or what is right and wrong.
The dating of artifacts is done by a carbon dating age system based on
the development of tools and technology. They used the carbon that is left in
the artifacts of the deceased.
