Symbols on 4,000-Year-Old Rock Art Hint at Unknown Culture
![Symbols on 4,000-Year-Old Rock Art Hint at Unknown Culture](https://assets.realclear.com/images/65/655652_1_.jpg)
Hidden deep in the highlands of southern Venezuela, archaeologists have uncovered one of humanity's best-kept secrets.
At around 20 different sites, carved and...
Hidden deep in the highlands of southern Venezuela, archaeologists have uncovered one of humanity's best-kept secrets.
At around 20 different sites, carved and...