字幕列表 影片播放 列印英文字幕 Imagine if every tweet, snapchat, and YouTube comment ever made was preserved for eternity? Well, we might have the technology, for better or worse. Hey guys, Amy with you on DNews today talking some incredibly mind-bending data storage technology! The new technology comes from scientists at the University of Southampton's Optoelectronics Research Centre. They developed a five dimensional recording and retrieval process on fused quartz using femtosecond laser writing -- meaning a laser pulse that lasts one quadrillionth of a second. Yeah, you heard that right: a laser is recording data on quartz in 5 dimensions! To break this down, let's compare this new technology to a CD. When data is stored on a conventional optical media like a CD, it's stored by burning tiny bumps on one or more layers of a plastic disc. This means it's stored as bumps using three spatial dimensions: height, length, and width. When the data on a CD is read, a laser light is bounced off the disc, registering a 1 when the light bounces off a bump and a 0 when there's no bump. With those 1s and 0s, it can store anything from books to music to images. But this new technology of recording data using a femtosecond laser on a fused quartz disc, it's not making a bump like a CD or a pit like a vinyl record, instead it's creating self-assembled nanostructures, which are basically layers of 3D dots called nanograting. And this nanograting produces birefringence in the quartz, bringing out optical properties rooted in its refractive index. And the scientists have taken advantage of this birefringence to access two “new” optical dimensions. When data is read from a five-dimensional quartz, the light being bounced back and read depending on the nanograting's orientation is the fourth dimension. The varied strength of the laser's light refracted by the structure is the fifth dimension. Add these to the traditional three-axes of height, length, and width, you get five dimensions. By taking advantage of multiple dimensions, each spot in the glass can store three different bits of information. One file is written in three layers of nanostructured dots each separated by five micrometres (one millionth of a meter), which is less than 0.0002 inches, meaning it's incredibly densely packed. And with so much data stored in such a tiny way, the implications are huge. This storage method means 360 Terabytes of data can be stored in one small crystal. This is a crystal with the whole of the King James Bible stored on it. And while the information on a CD is superficial and can be scratched off, the data stored in quartz is safe within the structure of the extremely resilient material. It can withstand temperatures as high as 1,832ºF (1,000°C ) and will last virtually forever stored at room temperature. This kind of technology could change the way we store and read data. No more worrying about degrading a video tape or scratching a disk. The whole of human history could really be saved in a format that could well outlive the human race. But how does it stack up to the human brain? Trace looks into how much our brains can store in this episode right here. So, of all the everything that's ever happened, what do you guys think is worth preserving for a literal eternity? Let us know in the comments below, and don't forget to subscribe so you can watch a new DNews episode every day of the week. So, of all the everything that's ever happened, what do you guys think is worth preserving for a literal eternity? Let us know in the comments and be sure to check back here every day for more DNews. So, of all the everything that's ever happened, what do you guys think is worth preserving for a literal eternity? Let us know on the Discovery News Facebook page or Twitter feed @DNews. And you can find me there, too, I'm @astvintagespace. Thanks for watching!