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Microsoft’s Project Silica uses lasers to store data in glass, creating a storage medium that is fireproof, waterproof, and lasts for thousands of years.

The fragile era of the hard drive is ending as scientists at Microsoft Research unveil a glass storage technology capable of preserving human knowledge for ten thousand years.
In a laboratory in Cambridge, researchers have perfected "Project Silica," a revolutionary method of archiving data that could render magnetic tape and spinning disks obsolete. By using ultrafast lasers to etch data into quartz glass, they have created a storage medium that is virtually indestructible—immune to flood, fire, and the magnetic decay that plagues current technology.
The technology works by turning digital data into 3D "voxels"—tiny deformations inside the glass structure created by femtosecond laser pulses. Unlike CDs or DVDs which write on the surface, this method writes inside the material, creating hundreds of layers of data in a piece of glass just 2mm thick. "It has incredible durability," says Richard Black, research director of the project. "Once the data is in the glass, it is safe for millennia."
The implications for global archives are profound. Currently, cloud data centers must replace their hard drives every few years to prevent data loss, a costly and environmentally damaging cycle. Glass storage offers a "write once, read forever" solution. Microsoft has already demonstrated the tech by storing the 1978 Superman movie on a coaster-sized slide, retrieving it with zero errors.
This breakthrough is not just about cloud storage; it is about legacy. For the first time, humanity has a medium that can survive the collapse of civilization. Just as we read stone tablets from ancient Sumer, future generations—or alien visitors—could decode the history of the 21st century from these glass blocks.
The project is now moving from the lab to the pilot phase, with Microsoft eyeing potential partnerships with museums and national archives. In a world where digital rot threatens to erase our collective memory, Project Silica promises that our stories, our science, and our art will not fade away. We are finally carving our history in something as permanent as stone, but written with the speed of light.
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