Maybe I’m just too cynical, but when I saw the photos of these newly discovered engravings on a wall in a 30,000 year old, I had the same thought Jorn Barger had: I wonder if this may prove to be a hoax?
Look at this picture, for example, which I swiped from the Associated Press depicting a bison and a horse (presented here for educational purposes, blah, blah,blah):

Maybe it is genuine, but it looks too good to be true — frankly it looks like it was made with somebody using modern tools.