Conversation so far:
the oldest expression in art is found in caves in the south of what country
Crosshatching done in ochre on a stone fragment found at Blombos Cave in South Africa is believed to be the earliest known drawing done by a human in the world.
how old is the earliest known drawing done by a human
The earliest known drawing by Homo sapiens is estimated to be 73,000 years old.

Question: from what period was the drawing
Self-contained rewrite: from what period was the 73,000 year-old drawing