The YouTube video below is rather long but if anyone has an interest in the subject, it is well worth watching. I have also included a link to the site that is mentioned in the video: for those that maybe missed my last mention of it, please look as it is one of the best and most informative sites I have ever seen.
Another point worth mentioning is: why would I include a topic that refers to Saudi Arabian rock art when I am in Oman?
Because they have come to realise its importance and that it is very much part of the regions cultural heritage. Not to mention that from an educational point of view, they are willing to spend money promoting the subject and most importantly, make it easily available for anyone to see for free. Oman seems to make it an academic subject and so information is not widely published outside learned journals – one needs to search for it.
here is the link to the site mentioned: http://saudi-archaeology.com/overview/team/