The first video is a preview of NATURE's two-part special DOGS THAT CHANGED THE WORLD, and tells the epic story of the wolf's evolution, how ''man's best friend'' changed human society and we in turn have radically transformed dogs. Part one, ''The Rise of the Dog,'' premiered Sunday, April 22 on PBS. Part two, ''Dogs by Design,'' ...

Where does technology end and our idea of God begin? Human beings evolved to perceive a distinction between 'ourselves' and our 'technology'. Increasingly though, our technological achievements are becoming extensions of our bodies, our identities and our minds, forcing the realm of the human out and into the world of synthetic form. The less ...