A Hologram?

Steven Hawkings suggests the Universe is a hologram (via Ars Technica):

The proponents of string theory seem to think they can provide a more elegant description of the Universe by adding additional dimensions. But some other theoreticians think they’ve found a way to view the Universe as having one less dimension. The work sprung out of a long argument with Stephen Hawking about the nature of black holes, which was eventually solved by the realization that the event horizon could act as a hologram, preserving information about the material that’s gotten sucked inside. The same sort of math, it turns out, can actually describe any point in the Universe, meaning that the entire content Universe can be viewed as a giant hologram, one that resides on the surface of whatever two-dimensional shape will enclose it.

I wish I understood what the fuck this means. Couldn’t they put it into terms a layman could understand?
Kinda like Egon did with the twinkie.

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