The method, detailed today in Nature, is specific to bacteria, but Yaniv Erlich, a computer scientist and biologist at Columbia University who was not involved in the study, says it represents a scalable way to host information in living cells that could eventually be used in human cells.

The modern world is increasingly generating massive amounts of digital data, and scientists see DNA as a compact and enduring way of storing that information. After all, DNA from thousands or even hundreds of thousands of years ago can still be extracted and sequenced in a lab.

CRISPR was also used to encode this image of a hand into a bacterial genome.

So far, much of the research into using DNA for storage has involved synthetic DNA made by scientists. And this GIF—only 36 by 26 pixels in size—represents a relatively small amount of information compared to what scientists have so far been able to encode in synthetic DNA. It’s more challenging to upload information into living cells than synthesized DNA, though, because live cells are constantly moving, changing, dividing, and dying off.

Erlich says one benefit of hosting data in living cells like bacteria is better protection. For example, some bacteria still thrive after nuclear explosions, radiation exposure, or extremely high temperatures.

Beyond just storing data, Seth Shipman, a scientist working in Church’s lab at Harvard who led the study, says he wants to use the technique to make “living sensors” that can record what is happening inside a cell or in its environment.

“What we really want to make are cells that encode biological or environmental information about what’s going on within them and around them,” Shipman says.

Though this technique won’t be used anytime soon to load large quantities of data into your body, it could prove to be a valuable research tool. One possible use would be to record the molecular events that drive the evolution of cell types, such as the formation of neurons during brain development.

Shipman says you could deposit these bacterial hard drives in the body or anywhere in the world, record something you might be interested in, collect the bacteria, and sequence the DNA to see what information has been picked up along the way.