Episode 290 Part 4 - Falling Space Junk, Back Pack Brain

China's space station is hurtling from space and parts of it are certain to survive re-entry into our atmosphere. Which cities are in the cross hairs? Plus, your child may be damaging his or her brain just by lugging that heavy backpack to school. And, even though driverless cars are not safe enough for prime time, there are plans to build driverless-only highways. This bite-sized chunk of episode 290 is sponsored by Aquasana.