Which is like transparent aluminum, except that it actually exists outside of Star Trek IV: The Voyage Home. I’m guessing: there’s science involved, and I let my wife handle the science above a certain (read: ‘minimal’) level. Sounds like they’ve worked out how to make the glass significantly less brittle, which will give all sorts of structural advantages. Was that a safe summary? I think that was a safe summary: I’m going to quit while I’m ahead.