Every electronic device you have ever owned shares a critical weakness. Push it past roughly 200 degrees Celsius and it begins to fail. Your phone, your car's computer, the satellites orbiting above your head right now, all of them have the same thermal ceiling baked into their design. For decades, that ceiling has been one of the most stubborn walls in engineering. Now, a team at the University of Southern California may just have broken through it. In a paper published in the journal Science ,