How the tech used to make giant, ultrahigh-precision mirrors and lenses for the James Webb Space Telescope was repurposed to develop displays for mobile devices (Christopher Mims/Wall Street Journal)

Christopher Mims / Wall Street Journal:
How the tech used to make giant, ultrahigh-precision mirrors and lenses for the James Webb Space Telescope was repurposed to develop displays for mobile devices  —  To peer deeper than ever into space, NASA needed optics of unprecedented size; the technology to make them was later repurposed …