Nature and Science documentaries.

So I just decided to pop in an episode of The Blue Planet, and I realized that I need to watch more good documentaries. Specifically nature and science documentaries, because that stuff is great. The only problem is that most of the ones I see tend to be too dumbed down. I don't actually learn anything from them, I basically just end up watching cool footage of animals.

So...does anyone else here like watching nature and science documentaries? Any good suggestions on something for me to check out? Keep in mind, please nothing dumber than "The Blue Planet" or "Planet Earth". And if you're suggesting a documentary that has anything to do with astronomy, please nothing more than 5 years old.

Through the Wormhole with Morgan Freeman, and Into the Universe with Steven Hawkings are both good.

Wonders of the Solar System. It's a BBC documentary series so I guess the availability will vary depending on where you are.

If you like geology and physical sciences, then How The Earth Was Made is a great show, very informative. I also like anything by Nova. My girlfriend just mentioned Isabella Rossolini's animal breeding show: Green Porno. Very funny, yet, very educational.

watch BBC Life as well... it goes with planet earth and blue planet. they also have docs on dinosaurs and cavemen (bbc docs i mean) but they're not in HD as far as i know