Eternal Glass: Microsoft Challenges Time with Project Silica

Microsoft has engraved nearly 2 terabytes of data onto a piece of glass the size of a coaster. Project Silica promises durable, resilient data storage lasting 10,000 years.

In the world of digital storage, where data grows at rates that defy any forecast, Microsoft has taken a step that feels like applied science fiction. In the company's Redmond laboratories, researchers have engraved nearly two terabytes of information onto a fragment of borosilicate glass roughly the size of a standard coffee coaster. This is not an isolated experiment or a technical demonstration without deeper purpose: it is the tangible result of years of work on Project Silica, a project that aims to redefine the very concept of digital memory from the ground up.

The mechanism behind this technology is as elegant as it is sophisticated. Ultrafast lasers imprint data into the heart of the glass through single pulses lasting one trillionth of a second, creating three-dimensional microscopic structures called voxels. These voxels are distributed across hundreds of overlapping layers within the material, transforming a simple piece of glass into an archive of extraordinary density. To retrieve the information, a microscope captures images of each individual layer, which are then decoded by an artificial intelligence-based visual recognition model capable of interpreting patterns with absolute precision and zero margin of error.

What makes Project Silica truly revolutionary, however, is not just its writing capacity. It is the intrinsic nature of the material itself. Borosilicate glass, the same commonly used for kitchen food containers, requires no energy supply to preserve the data stored within it. It withstands temperatures up to 290 degrees Celsius, is impervious to water, insensitive to radiation, and completely immune to magnetic fields, which represent the Achilles heel of conventional hard drives. According to estimates from Microsoft's researchers, published in the scientific journal Nature, data crystallized in glass could survive intact for at least ten thousand years.

The comparison with current storage systems is stark. The data centers powering the global cloud consume enormous amounts of energy simply to keep active the magnetic tapes on which billions of files reside. These media also have a limited lifespan and require periodic data migrations to prevent irreversible loss. Project Silica eliminates both problems at once: no standby energy consumption, no technological expiration dates to worry about.

Future challenges relate primarily to optimizing writing and reading costs, still high for industrial-scale use, and to developing robotic systems capable of navigating among millions of glass plates inside massive data centers, managing zettabytes of information with the same efficiency with which one accesses a file on a smartphone today. Microsoft is already seeking its first clients interested in crystallizing their archives permanently. One emblematic case involves Warner Bros., which has already entrusted this system with the preservation of the 1978 Superman film, safeguarding it on a quartz plate for future generations.

The impact on the artificial intelligence ecosystem could be profound. AI models require enormous historical datasets to train on, and the possibility of preserving them on physically stable, energetically neutral, and practically eternal media would open unprecedented scenarios for managing collective digital memory. Not just storage, but a genuine library of humanity engraved in stone, or rather, in glass.

Source: Microsoft Research, published in Nature (2026)