Ancient artifacts, Wamena, Papua, Indonesia

This is a picture in a cave taken December 2018 in Wamena, Papua. There is a 20 foot wall that is a clean vertical drop where no human could have drew this picture and when asked on the property, they had said no human drew this and was before humans were here. Well i wouldn't go that far, but it was defiantly prehistoric drawings, which had made the noses quite different on the pictures. You can see two main drawings here with a man and women in each. Take a look, let me know what you think