ManusJustus on 02 September 2010
Because gravity shapes space and time, it allows space-time to be locally stable but globally unstable. On the scale of the entire universe, the positive energy of the matter can be balanced by the negative gravitational energy, and so there is no restriction on the creation of whole universes.
Thats a quote from MSN.com which gives a more detailed idea of what hawking's theory is. Can't wait for the book!
