The drawings, in turn, may represent the sounds that early humans generated in those spots. ... Cave artists were thus not just early-day Monets, drawing impressions of the outdoors at their leisure. Rather, they may have been engaged in a process of communication.
Yes the pyramids have survived 4 a long ti,e and kept the dead in there. So technically it was succesful
This one is a tough one I would say cause it helped with the mind which made people smarter
