Some people are are saying that the universe might be a hologram

So some people are saying that the universe might be a hologram, what does this mean exactly?

Yeah and many of them are the same ones who claim the universe consists of 11 dimensions. I'm really skeptical of both models as they appear more like math quirks than physics.

Nature does things the easy way; it is lazy, it conserves energy. That's why, for example, nature likes to form spheres rather than cubes when it has a chance to choose. So it's not about to do things that take more time and energy than it needs to. The hologram model and the higher dimension model are not the easy way, the minimum energy way of getting the same results.

No, I tend to stick with the notion that I, you, and my dog Boots are real; not projections off the rim of the universe where the "real" us are found. And remember, they (the eggheads) added those extra dimensions of string theory to make the answers come out not silly.

Don't forget, physicists are not above fudging the equations to make things come out the way they think they should. Einstein's "biggest mistake" by his own admission was putting the cosmological constant into his theories to keep the universe static like he knew it was. And then along came Hubble...oops.

I hope not...computers are pretty stupid you know. But, again, that's not nature's way. And it's way beyond mere mortal beings to execute....even if they were the First, who evolved into highly intelligent beings 9 billion years ago....shortly after the first inhabitable galaxies and solar system

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This is known as the Holographic Principle.

And it goes something like this: The origin of the Universe traces back to the degrees of freedom associated in the unified description of space-time and matter, all wrapped up in the quantum theory of gravity. This is much like a hologram.