Everyone knows we're living into a 3 dimensional world, whereas time is being defined as the invariable 4th dimensional frame we're experiencing. Dimensions is a website explaining this stuff in nine chapters, two hours of maths, that take you gradually up to the fourth dimension. Mathematical vertigo guaranteed!


If you really want your head to go for a spin, then watch this video of how to imagine the 10th dimension, the place were quantum physicists believe this is were superstring particles vibrate, and thus create subatomic particles.