I have been asked to post a reminder to watch the new Discovery Channel series Planet Earth which starts Sunday March 25th at 8pm ET. You can go here to see a trailor. And you can go here to see 4 new very short videos but for some reason the sound doesn't seem to work. No matter, the pictures are impressive. I especially like the one where the man parachutes into a super deep cave.
Here is a photo Gallery with credits.
For even more info you can go to my original announcement of Feb. 8th. 2007.