San Francisco is living a double life, where taxpayer dollars are saved, disasters are averted, massive structures are built and lives are saved. “Digital twins” are highly detailed three-dimensional models run by computer programs that are being used to help run hospital buildings and parts of the airport, and to replicate the human heart, putting San Francisco at the forefront of the technology, experts say. All the data available about a real-world building or vehicle is entered into a computer program that replicates the original in three dimensions on a screen. https://www.sfexaminer.com/fixes/digital-twins-manage-the-airport-and-hospitals-are-people-next/