article_snippet.sent: his theory would allow matter and energy to be held for a period of time before being released back into space .
article_snippet.sent: A full explanation of this process, Hawking admits, would require a theory that successfully merges gravity with the other fundamental forces of nature.
article_snippet.sent: Interactions between particles can range from gravitational attraction to the exchange of mediators like photons between particles.
highlights_snippet.sent: Comments made by Dr Dejan Stojkovic from the University of Buffalo .
   says clues to contents lie in interactions between particles emitted .
  