Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. What is Bluetooth? – Henry, age 13, Somerville, ...

Is the return of wired headphones driven by a simple desire for better sound quality or is it part of a backlash against modern tech? Thomas Germain tries to find out.

Add Yahoo as a preferred source to see more of our stories on Google. How do headphones, toys, gadgets and other devices talk to each other without any wires? Many of them connect with Bluetooth. It’s ...