> I know no sane scientist or enigneer that would say they use more than 3D physics. It's completely common for scientists to use more than 3D, since D does no

> I know no sane scientist or enigneer that would say they use more than 3D physics. It's completely common for scientists to use more than 3D, since D does not have to mean spatial dimensions. Relativity is 4D (space+time), M-Theory is 11 or 26 or 10 depending on context. Even classical mechanics is formulated as 6D (3 position, 3 momentum). This leads to Hamiltonians and Lagrangians, cornerstones of modern physics, upon which all modern physics is based. As to light, it's east to find multiple dimensions to store light patterns: 3D space, 1 D polarization, 1D frequency, and now we have 5 independent dimensions in which to store data. 5D, if they use 5 independent degrees of freedom to store data, does not undermine the science - it makes it precise. The title of the paper is "5D Data Storage by Ultrafast Laser Writing in Glass" and is an invited paper at a top conference in their field. I suspect the '5D' being in the title means it is not marketing hype but actual physics. EDIT: Here [1] is the paper. They do use 5 degrees of freedom as I expected: 3 position, slow-axis orientation, and retardance. So it most certainly is 5D storage. [1] https://www.researchgate.net/publication/297892219_Eternal_5D_data_storage_via_ultrafast-laser_writing_in_glass https://www.researchgate.net/publication/297892219_Eternal_5...