>people who lived in ancient France were drawing wild animals such as rhinos and lions.
My guess is that when Homo sapien met the people who live in caves, they got to talking about africa and one human was trying to explain rhinocerous and after a while they got frustrated and said "no you're still not getting it. Give me that ink over there, I'll show you."
And then they drew the rhino and also a group of people, for scale.