Yo anyone, Could someone enlighten me as to why, if there is a 4th spatial dimension, we can't see 3D shadows of 4D objects? Lots of talented people built an amazing 3D shadow of a 4D object but I'm almost certain I've never seen one pop in and out of existence while on the way to the shops or whatever: http://www.sciencenewsdaily.org/story-7409.html Wouldn't a 2D being see a shadow of a 3D object as an intangible 2D object? So wouldn't we see a shadow of a 4D object as an intangible 3D object? Are there no objects in the 4th dimension? Someone sort me 'ed aaaaat!