Wearable technology is finally beginning to go beyond the wrist. "Why should you have to take off your earphones when you finish listening to something and put them back in a box or bag, instead of just wearing them around your neck like jewelry?"
The concept is pretty simple. The team crushed up a bunch of neodymium permanent magnets, like the kind you find in electric motors and hard drives, into microscopic particles. It then inserted them into the ink used to make printed electronics, along with carbon powder to increase conductivity.