Stephen Hawking wrote 1999: So what the singularity theorems are really telling us, is that the universe had a quantum origin, and that we need a theory of quantum cosmology, if we are to predict the present state of the universe."Quantum Cosmology, M-theory and the Anthropic Principle – Stephen Hawking". Archived from the original on 2015-02-14. Retrieved 2015-02-14.
Stephen Hawking wrote 1999: So what the singularity theorems are really telling us, is that the universe had a quantum origin, and that we need a theory of quantum cosmology, if we are to predict the present state of the universe."Quantum Cosmology, M-theory and the Anthropic Principle – Stephen Hawking". Archived from the original on 2015-02-14. Retrieved 2015-02-14.