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Any idea how they survived this long? They appear to be exposed to the elements, and they're paintings rather than carbings. I'd have expected rain, wind, and plants to have destroyed them after a hundred centuries, but they look fresh and sharp.

Were they covered somehow? Are they protecting them now?

Exactly, from the pictures it appears to be an exposed rock face exposed to daily tropical rains for millennia. Something doesn’t add up.
No idea, but the clarity is astounding: http://www.bradshawfoundation.com/bfnews/uploads/colombia_ro...

I also don't understand the ethics of this though

> The discovery was made last year, but has been kept secret until now as it was filmed for a major Channel 4 series to be screened in December: Jungle Mystery: Lost Kingdoms of the Amazon

I poked around a bit and was unable to find any academic papers coming from this, just the documentary. That smells off, too.

The academics involved are genuine. I don't really know anything about archaeology at that level, so maybe I'm just missing the papers. But I want to know more about the site, and documentaries are a terrible way to learn stuff.

It sounds sincere in this case, but I always chuckle a bit when academic researchers are quoted with "It's going to take _many years_ of further research to understand this!"
> Speculating on whether the paintings had a sacred or other purpose, he said: “It’s interesting to see that many of these large animals appear surrounded by small men with their arms raised, almost worshipping these animals.”

I'd put my money on "yum, let's eat" personally.