Filmmaker Werner Herzog was interviewed yesterday on NPR's Fresh Air about his 2010 film, "The Cave of Forgotten Dreams", just before it's US release at the end of April. This film, shot in 3D (I know, I know) contains footage of some of the oldest cave paintings on the planet. The Chauvet Cave in Southern France is closed to the public, due to it's immense sensitivity and presence of harmful levels of radon and carbon dioxide. Herzog, creator of many films, including Grizzly Man and Encounters at the End of the World, is known for going to unprecedented lengths and some of the most inhospitable places for footage. I don't know about the whole 3D thing (Herzog speaks to this skepticism which he initially shared) but this looks amazing.Check out the trailer here.