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.
from what period was the 73,000 year-old drawing
Blombos Cave is famous for its Middle Stone Age artifacts that were left by humans who lived there between 100,000 and 70,000 years ago.

Question: when did the species start
Self-contained rewrite: when did the human species start