Thanks fieldmarshaldj. And thanks Red Badger for sending a link to a Pop Mechanics article about it, back on the 5th.
Whoops.
This Could Be Neanderthal Art
Those etchings didn’t come from nowhere.
By David Grossman
May 3, 2018
Majkic, et. al
https://www.popularmechanics.com/science/archaeology/a20140099/neanderthal-symbolic-art-study/