https://techcrunch.com/2023/03/17/unearthly-materials-superconductors-investors/

Ever since they were discovered over 100 years ago, superconductors have seemed a bit magical.

You might have seen one on YouTube, levitating above a pool of liquid nitrogen, shrouded in vapor as the super-chilled seventh element boils off. Or maybe you’ve been inside a much larger one that was cooled by liquid helium, generating tremendous magnetic and radio waves that allowed doctors to peer inside your body as part of an MRI.