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 ...

Ever wondered what’s hidden beneath a peaceful lake? I dropped my strongest magnet yet into the murky depths—and what I pulled up shocked me. From rusty mysteries to valuable surprises, this magnet ...

There's a magnet in a secure room in central Tokyo. It's an electromagnet, the kind that generates a magnetic field when ...