Brian Greene

One of the strangest features of string theory is that it requires more than the three spatial dimensions that we see directly in the world around us. That sounds like science fiction, but it is an indisputable outcome of the mathematics of string theory.

The central idea of string theory is quite straightforward. If you examine any piece of matter ever more finely, at first you'll find molecules, atoms, sub-atomic particles. Probe the smaller particles, you'll find something else, a tiny vibrating filament of energy, a little tiny vibrating string.

I went to graduate school with zero expectation. I kind of backed into it. I wanted to go back to school because I felt gaps in my literary background. I studied mostly twentieth-century English literature in college, so I thought, 'Maybe I'll go back for my writing.'