The presence of soft particles along the event horizon, and their attendant symmetries, may point toward a way out of this dilemma. (discovermagazine.com)
Recent papers by Strominger and his colleagues, Stephen Hawking and Malcolm Perry of Cambridge University, suggest that material falling into a black hole adds soft particles to the black hole's boundary, or event horizon. (discovermagazine.com)
He notes that Strominger has found that soft particles reveal subtle symmetries of the known forces of nature, «some of which we knew and some of which are new». (scientificamerican.com)