1. Google's self-driving cars will hit public streets this summer. Engadget.2. Chinese unmanned factory replaces 600 humans with 60 robots. IEEE.org. 3. 1 billion people used Facebook in a single day. 4. Paper Airplane Drones. 5. Charted: global life expectancy on the rise. Economist. 6. Drone-killing laser cannons, from Boeing.