A few talks from the TED conference for 2007, where some of our greatest minds have gotten together to discuss how we can improve our world :)
I realise some of these are old, and have done their rounds on the net, but theres some deep thoughts from smart people here and I think their worth sharing for those that missed them..

Stephen Petranek - 10 Ways the World could end
This one freaks me out a little, especially the particle accelerator mishap section. We keep snippets about these massive laboratories where they expect to create BLACK HOLES right here on earth. First time I heard that I flipped out, but only 2 of my circle of friends seemed to think there was any risk involved, the others just thought "neat" and immediatly forgot about it. We need somebody to watch over these experiments before a bunch of mad scientists kill us all!
Its not all doom and gloom though, this guy actually has some decent solutions to many of the problems. Worth the watch.

Will Wright - Toys that make worlds
This genius brought us some of the most innovative, deep games ever released, and I've been dying to get my hands on his latest baby Spore ever since I first heard about it almost 3 years ago now. This talk isn't strictly about the game itself, but it does show a lot of the elements involved, and how far the game has come since his last demonstration.

Daniel Gilbert - Why Are We Happy? Or Not?
Some interesting views and studies on what makes people happy. Or what makes people decide that they think they're happy. Or something.
This one is mainly aimed at Mr Hapiloons, I wanna know what you think of this..

You could literally lose days in the video section of Ted.com. Try it. You might learn something.