What will the world look like in 100 years? What about 1,000 or 1,000,000 years from now? While we can’t know the future, we can say with some certainty that technology will play a huge part in it. In this episode, historian David Christian and Kevin Kelly, futurist and Senior Maverick for Wired magazine, discuss why we need a healthy dose of optimism and imagination to envision the future of technology. Click here to learn more about Big History.