Tiny super-strong magnets sold as toys were banned several years ago, but now some of them are back on the market. That's putting kids in the emergency room. Children swallow the powerful magnets ...

Add Yahoo as a preferred source to see more of our stories on Google. There's a magnet in a secure room in central Tokyo. It's an electromagnet, the kind that generates a magnetic field when ...

There's a magnet in a secure room in central Tokyo. It's an electromagnet, the kind that generates a magnetic field when electrical current flows through it. The last time the scientists who operate ...