Instruct: Classify a review as either positive or negative.
Query: Not much more than you can see online for free

I watched the previews and everything I could find online from this guy. I was disappointed to find that the DVD contains very little more than what was available for free on National Geographic's website. Also, you can find him on TED giving a lecture on another topic. He is a great speaker and very interesting man, but this video wasn't worth the money. I suppose I can feel good about paying for something that hopefully went to fund scientific research, or at least some portion of my money went to fund scientific research. I hope he got good royalties because he seems like a cool dude.