December 11, 2019 edition of the Journal Nature provides evidence and discussion of an even earlier cave painting dated 43.9 ka in Indonesia than the ones discussed in the next chapter: https://doi.org/10.1038/s41586-019-1806-y. Here is the NPR story that reported the finding: https://www.npr.org/2019/12/11/786760790/44-000-year-old-indonesian-cave-painting-is-rewriting-the-history-of-art, continuing to blur the evidence related to the simultaneous development of visual cave art and musical instruments.