IDK

Time.

Could you explain please? I'm seeing on google and stuff (oprah.com -.-') that we are moving into this "Fourth dimension"

I just watched this episode of Cosmos yesterday, Sagan gives a pretty good explanation.



Also,

http://teamikaria.com/hddb/classic/introduction.htm

I'm sure Wikipedia gives a decent explanation, too. Don't know why you would go to Oprah's site for this kind of information, though.

So hes explaining how 2nd dimension is left and right, 3rd demension is left right up down but no one really know what the 4th demension is? And what could people mean by saying "moving into the 4th demension"?

How in the world can the 4th dimension reflect a 3d object?

A tesseract is not the actual reflection of a 4-D object, it's just what the reflection would LOOK like.



You can't "move into" the 4th dimension. Objects in the 3rd can't interact with objects in the 4th, just as objects in the 2nd can't interact with objects in the 3rd. Referring to Sagan's example, the 2-D "Flat-land" person doesn't realize that the 3-D "apple person" is 3-D; the 2-D person only sees a plane of the 3-D person at a time. I'm not entirely certain what a theoretical 4-D person would see when looking down on a 3-D world. The link that I provided explains it much better than I could.

There are three dimentions of space and Einstein thinks space and time should not be different and that they should be taken as the same concept: spacetime while time is the forth dimention

Just watched that entire thing
very hard to follow through