Roger McNamee: Six ways to save the internet. Andrew Blum: What is the Internet, really? Mikko Hypponen: Fighting viruses, defending the net. Mundo Hacker Radio de Mundo Hacker Radio. Mundo Hacker Radio de Mundo Hacker Radio. Eric Topol: The wireless future of medicine. Tan Le: A headset that reads your brainwaves. Kevin Kelly tells technology's epic story.