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## Cambridge

The English university where Hawking teaches.

## Special Relativity

The theory of physics that holds that no absolute well-defined state of rest exists.

## General Relativity

The theory that brings together special relativity and Newton's laws of gravity and understands gravity as a function of a single fabric of space and time known as spacetime.

## Quantum Mechanics

The principles which describe reality at the smallest levels of nature. It has also had a revolutionary impact on how scientists understand reality.

## Quantum Gravity

That part of theoretical physics which tries to combine quantum mechanics and general relativity into one theory.

## P-Branes

A p-brane is a mathematical idea that is extended into space and that represents a precise number of dimensions. Superstrings are 1-branes, having only length, but 2-branes are membranes. These branes extend throughout spacetime.

## The No-Boundary Condition

Hawking and Hartle has suggested that spacetime curves back in on itself...

This section contains 370 words(approx. 1 page at 400 words per page) |