Werner Herzog filmed this 2010 documentary in 3-D – but even in 2-D, it’s breathtaking. Herzog takes us into the Chauvet Cave in southern France, and its Paleolithic cave paintings estimated to be more than 30,000 years old. Herzog, who narrates, has a whispery, reverent, poetic tone, as he explains how the paintings were found, how difficult they were to film, and how experts have interpreted them. They’re thought to be the oldest cave paintings in existence – and, thus,