PROOF OF THE EXISTENCE OF THE 4TH DIMENSION 

As most people know, black holes have a gravitational field so large that not even light can escape it. But its not just Black holes that can alter the path of light. Very heavy objects can distort light and make a light ray bend around it. Galaxies can do this as they have an extraordinarily large mass. If  2 galaxies are directly aligned with us, the galaxy closest to us will bend the light, and the galaxy behind it will appear distorted and will often appear as an illuminated ring around the closer galaxy.  This effect is called Gravitational lensing (aka galactic lensing). The image to the left is a diagram of this.

Using this phenomena, we can calculate the mass of a galaxy by measuring how much it distorts the light. What we find while doing this is that there is a lot of mass in most galaxies that is having an effect on light however is not actually present. This is a type of dark matter and what we find is that in some galaxies, up to 90% of the mass is not actually present. Mass is occupying the region where the galaxy is located however in 3 dimensional space, its not there! The explanation to this is that the hidden mass must be occupying the 4th dimension, so it still has an effect on light, however it's not present in the 3rd dimension. The 4th dimension can also explain the existence of worm wholes, which may one day in the distant future allow us to travel to distant places without spending millenia is interstellar spacecrafts.