Did you know that we have over one billion electronic switches in our smartphones? They switch one billion times per second, causing the phone to heat up and lose battery life. To prevent this from happening, Markus uses magnets - not the magnets we all know from our fridges, but nanomagnets, only a couple of atoms thick. Markus and his group turn them into switches which can communicate with each other, allowing information flow and computation. And there might even be more tricks out there for them to learn that nobody has thought about yet!