It's...... all metal ships are just nails on a magnet. What the hell. That's so obvious and so awesome and I don't think I'd ever have noticed it. I love magnetism! I love navigation! I know about how cool quantum-bio effects allow a pigeon to sense the magnetic field with an organ that's too small to do that!<br><br>But I never once considered that a giant hunk of iron moving through the field would become a massive/tiny magnet all its own. Awesome.