There’s a great exchange in the middle of the clip. If you’re interested in prehistoric cave porn then watch the clip, or you could cheat and read my transcript.

Hertzog – …it contains the oldest paintings ever discovered, more than twice…
Colbert – How old are they?
Hertzog – 32,000, maybe 35,000 years back in time and of absolute incredible quality.
Colbert – How could a painting be 32,000 years old if the entire world… is only 6000 years old?
Hertzog – I think that’s a mighty good question, but I think these people are are very ingenious and very well adapted…I do believe these very intelligent people invented God, but it took God a while to grow up and create the world…
Colbert – I don’t usually have guests this deep.