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Researchers can store data in DNA; the hard part is retrieving it

Lucas Mearian | Aug. 20, 2015
The cost of DNA storage today precludes it from being used by consumers.


A team of researchers this week announced that they can use DNA to store information for at least 2,000 years, and they're now working on a filing system to make it easier to navigate.

The researchers, from ETH Zürich, an engineering, science and technology university, said DNA storage could preserve troves of historical texts, government documents or entire archives of private companies, all in a droplet.

The DNA storage findings, presented at an American Chemical Society conference, note that the double helix has two major advantages over hard drives and other forms of electronic storage: size and durability.

In their presentation, the researchers highlighted flaws in today's electronic storage methods. For example, an external hard drive about the size of a paperback book can back up 5TB of data and might last 50 years.

"If you go back to medieval times in Europe, we had monks writing in books to transmit information for the future, and some of those books still exist," Robert Grass, a professor with ETH said in a statement. "Now, we save information on hard drives, which wear out in a few decades."

In theory, a fraction of an ounce of DNA could store more than 300,000 terabytes (1,000 gigabytes equals a terabyte).

The researchers pointed out that archaeological finds have shown that DNA from hundreds of thousands of years ago can still be sequenced today.

"A little after the discovery of the double helix architecture of DNA, people figured out that the coding language of nature is very similar to the binary language we use in computers," Grass said. "On a hard drive, we use 0s and 1s to represent data, and in DNA, we have four nucleotides A, C, T and G."

Grass' team has encoded DNA with 83 kilobytes of text from the Swiss Federal Charter from 1291 and the Method of Archimedes from the 10th century. They encapsulated the DNA in silica spheres and warmed it to nearly 160 degrees Fahrenheit for one week, which is the equivalent of keeping it for 2,000 years at about 50 degrees. When they decoded it, it was error-free.

In 2012, another group of researchers used DNA to encode versions of Martin Luther King's "I Have a Dream" speech in an .mp3 format, along with a .jpg photo and several text files.

Those researchers, from UK-based EMBL-European Bioinformatics Institute (EMBL-EBI), said their method for using DNA could store data for tens of thousands of years. The research paper, published in the peer-reviewed journal Nature, showed the DNA encoding method could store at least 100 million hours of high-definition video in about a cup of DNA.


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