[Jamie89]

Originally Posted by Northern Monkey

I get what you’re saying.I’ve looked a little into it too but it’s mind boggling.
I think it’s possible that there are other dimensions.Many people think that space-time is the fourth dimension.
Like you say though.We can only perceive three dimensions.Like if you dropped a cube down into a 2D world then to the inhabitants it’d just be a square.

We need Quantum computers and AI to figure this stuff out.Oh a Stephen Hawking.

Yeah there's loads of different views on the 4th dimension, and I haven't really looked much into the space-time stuff, it's mainly the 'tesseract' type theories that I've read about, like the 4th dimension just being an expansion of the 3rd in a similar way to the 3rd being an expansion of the 2nd. There's a really interesting theory that's basically we exist within the 4th dimension but we're unable to have any perception of it, just as the 2nd dimension can't have any perception of us, because each dimension can only view the one beneath it. For example we view the world in 2 dimensions (and are just able to perceive 3 dimensions because of lighting/depth perception etc), and within a 2nd dimension any inhabitants would only be able to view things in 1 dimension (and then have a perception of their 2nd dimension from that). So a 4th dimensional being in our world would not only not be visible to us in the way it actually exists, but it would be able to see the world in true 3D, ie. view all around objects and from all different angles and see through them as well, all at the same time, from multiple different points in space. And objects would appear completely differently to how we see them, just as like you said our cube would appear completely differently to how it would to a 2nd dimensional being. And then you keep going up to higher and higher dimensions and realise our perception of the world might not even be close to how it really exists. It's fascinating to think about (even if I'm not convinced of it all).