This looks very interesting. The cave itself sounds fascinating. It's called Chauvet Cave. Radiocarbon dating of the paintings goes back 20,000+ years! It's astounding, because there are drawings within the cave of animals and whatnot that most likely shouldn't be there. Animals that supposedly didn't exist during that time period in those areas of the world, making for a truly strange discovery.

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From MentalFloss:

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The cave is carefully preserved and the general public is not allowed to enter. Herzog received special permission from the French minister of culture to film inside the cave. Having received permission, Herzog nonetheless had heavy restrictions while filming inside the cave. All people authorized to enter must wear special suits and shoes which have had no contact with the exterior. Because of near-toxic levels of radon and carbon dioxide, nobody can stay in the cave for more than a few hours at a time.<br><br><br>

Herzog was allowed to have only three people with him in the cave: the cinematographer Peter Zeitlinger, a sound recorder, and an assistant. Herzog himself worked the lights. The crew was only allowed to use battery powered equipment which they could carry into the cave themselves, and used only lights which did not give off any excess heat. The 3-D cameras were custom-built for the production, and were often assembled inside the cave itself. Herzog was allowed six shooting days of four hours each inside the cave. The crew could not touch any part of the wall or floor of the cave, and were confined to a 2-foot-wide (0.61 m) walkway.

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<iframe src=http://player.vimeo.com/video/18964665 width="709" height="480" frameborder="0"></iframe><p><a href="http://vimeo.com/18964665">Cave of Forgotten Dreams</a> from <a href="http://vimeo.com/user4226299">Nate Calloway</a> on <a href="http://vimeo.com">Vimeo</a>.</p>

Link to the Chauvet Cave wiki

Looks really cool. What a find!

Also, the cave basically descends a very long way into the mountain. As you progress through the cave there are tons of cave paintings and fossilized remains. As you go deeper into the cave the levels of radon and carbon dioxide becomes very overwhelming. The cave eventually ends in a very large chamber room, where the concentrations of the gases are extremely high. Within this large endpoint are some of the strangest drawings within the cave, chimeralike and monsterous drawings. It's believed that these were drawn there due to hallucinations experienced by the cave dwellers due to the high concentrations of gases.

That would be about right.

Awesome. I'd like to watch the full thing.

Awesome. I'd like to watch the full thing.

You and me both bro. Looks like a cool movie. I'm a sucker for this kind of stuff.