Why do opposite poles of magnets attract and like poles push apart?
The Magnet Handshake
Why do opposite poles of magnets attract and like poles push apart?

Hold two magnets close and you can feel it — that invisible tug, that stubborn shove. Sometimes they leap together like old friends. Sometimes they refuse, sliding apart no matter how hard you press. What is this secret handshake happening just out of sight? Let's go looking.
Every magnet has two ends, and we call them poles — a north pole and a south pole. They're not the cold, snowy kind; they're just names for the two opposite "personalities" each magnet carries. And here's the rule the whole book is built on: opposites pull together, sames push apart.
