Window of the Mind (DC)

From the introduction:

Occam’s Razor tells us not to multiply entities beyond necessity. The flip side of Occam’s Razor tells us that if our theory requires an entity to work, then we can postulate that entity. The physics the old doctor had worked out required the existence of dimensions adjacent to our own and accessible to it. It was up to my research team to test his claim empirically, using what our detractors called a mix of super science and witchcraft.