The Amazon forests are a symbol of pristine, untouched nature. However, new findings change this idea: in the Colombian part of the Amazon, scientists found a 13-kilometer cliff painted with tens of thousands of ancient petroglyphs from the Ice Age.
To date the rock paintings was easy, there were images of extinct animal species - mammoth, a giant sloth and mastodonts. Archaeologists date the images to about 12,500 years old. The drawings are mostly in red ochre, and many of them are so high up on the rocks that researchers could only see them with drones equipped with high-resolution cameras.
The forests were not so untouched; mankind had trampled this land thoroughly in times immemorial. I would like to know how it is possible to ignore the 13 kilometers of painted rock all this time, and how to explain that some of the drawings are located where only drones can reach now.
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