Technology is evolving us, says Amber Case, as we become a screen-staring, button-clicking new version of homo sapiens. We now rely on "external brains" (cell phones and computers) to communicate, remember, even live out secondary lives. But will these machines ultimately connect or conquer us? Case offers surprising insight into our cyborg selves.

Amber Case studies the symbiotic interactions between humans and machines -- and considers how our values and culture are being shaped by living lives increasingly mediated by high technology. Full bio and more links