At TED 2013 last week, Danny Hillis, an early Internet user who registered the third domain name ever (Think.com), spoke on the vulnerability of the expanding Internet. While standing on stage for his talk, he held up a one-inch-thick notebook, which listed every person — including name, address and phone number — who had an Internet address in 1982. By his estimates, that book would be 25 miles tall in today’s world. Continue reading Danny Hillis Asks: What Happens if the Internet Goes Down?