What is the best/most interesting documentary you've seen?

Born in China
I learned that pandas sound a lot like humans. The cry of a baby panda can easily be mistaken for that of a human baby!

I can't think of a specific one off the top of my head but I like nature documentaries and paranormal ones. Especially paranormal ones. I also saw one on Hurricane Katrina that was decently interesting.

If you ever feel stupid and need something to make you realize just how stupid humanity can get,

There are quite a few. I have been watching a lot of them. Especially as a kid. You can say that certain Documentaries could even be considered my childhood. Not sure about my most Favorite but this is certainly one of them. It was around the time where I realized how much relatable a Dinosaur can really be. The Allosaurus has allways been one of my favorite ones as well. Pre-history in general was all the rage for me. It still is. Many documentaries like these provided to me an even bigger inspiration towards wanting to become a Paleontologist !!!!

I don`t know about one best, but I have seen quite a lot just by living in youtube. There was a very interesting one about split personality disorder and another one about Chernobyl that I remember in particular.

I've seen too many documentaries to decide. I've recently watched a documentary about the Black Death, it was pretty interesting.