Almost 200 engravings created around 12,000 years ago have been discovered in Saudi Arabia, including depictions of camels etched into cliff faces over 40 metres high
Več na: https://www.newscientist.com/article/2498144-ancient-artists-created-giant-camel-engravings-in-the-arabian-desert/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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