As is the case with Herzog’s other late-period documentaries, one’s interest is divided between information and atmosphere; you watch this a little bit because you’re interested in the astounding paintings inside the Chauvet Cave, and a lot because you want to hear That Voice talking about steam and the abyss of time and mutant alligators reclaiming the earth. I am a sucker even for the interminably slow tracking shots scored with lugubrious arias. If you ever start to feel like your individual existence matters in some way, watch this for a swift corrective.