Is Topological Ice Cream a Novel Prized Metal?

You can take an insulator and turn it into a conductor. Just by changing its shape. People used to think that if you had a material that's an insulator, then what happens when you start pulling it apart is that that insulator at the core becomes a conductor. And so this gets condensed materphysis very excited about the kinds of things they might be able to invent using these techniques in the future.