What's really amazing is that they still don't know the "why" other than some interesting speculation: religious purposes, places for psychadelic trips, "the creation of surpluses in some kind of hierarchy." Coincidentally, last week the local public television station was replaying a very old program of Bill Moyers interviewing Joseph Campbell, who died in the late 80s and was known for studies of mythology. He had…
There's no way to determine a "why" and there probably wasn't a single purpose in my opinion. The most interesting part to me, though, is how a lot of the hand "prints" include children.
"The Sun is a god who is jealous of his sister, the Moon, and once tried to get busy with a really pretty human, but her husband found out and..."
"Electrons are fundamental particles composed of quarks that..."
Having the answer is actually more important than verifing the answer, in most cases. It's part of why our advancement is slower than it could be.