If you haven't checked it out yet, I highly reccomend watching "Planet Earth" on the Discovery Channel. If you think you've seen good nature documentaries before, you haven't seen anything. They pulled all the stops for this one, 5 years in the works and filmed in high definition. They make great use of time lapse and low light photography and some of the shots they get are absolutely amazing.
Check it out, here's the link to the discovery channel webiste: Planet Earth on the Discovery Channel
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