What is the origin of painting among primitive people connected with? Why did scientists for a long time not believe

What is the origin of painting among primitive people connected with? Why did scientists for a long time not believe that rock and cave painting belonged to ancient people?

The origin of painting among primitive people is associated with an aesthetic need.
For a long time, scientists did not believe that rock and cave painting belonged to ancient people, because experts simply could not believe that cave people could be so capable of art.

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