Natives from the Amazon hunting cold-weather creatures. Plenty of evidence that Greenland was much warmer than today many times including during the last 1000 years. The planet has experienced climate swings much bigger than what we see now and they often came within decades and sometimes one could feel year-to-year changes. Water on the mill of those that say that climate change is a natural process and human-made CO2 has no part in it.
The paintings are at least 11,800 years old and depict ancient Amazonian people killing mastodons and interacting with other animals from the ice age.