Did you watch the US version (narrated by Sigourney Weaver) or the UK version (narrated by David Attenborough) ?
I watched the UK version--I didn't realize there was an American version. I love Attenborough's voice.
Oh, yes. I love this series also! There's something so bittersweet about it. There's so much beauty and it's all in such a fragile state.
I agree, this can make you feel sad, to know what we are seeing today may not be available through 'live' experience in future. I have started ready 'Hot, Flat and Crowded' by Thomas Friedman, where he shows many examples of habitat's losing its species due to various reasons, it creates the similar emotions.
I wonder whether we will be smart enough to stop at certain point or go all the way to 'point of no return'...