Ah the new science. 3/4th about how everyone else was wrong, how this was neglected, how this changes everything and then a small portion about what it is.
Recently I found this very interesting, signs of writing about 40.000 years ago.
https://www.scientificamerican.com/article/stone-age-art-may...
I've read the paper and I don't find it really convincing. The reasoning works for the proto-cuneiform tablets because we have the historical context in support, but we don't have it in this case.