Nature is running a story about a physicist who claims that black holes do not exist. George Chapline, of Lawrence Livermore National Laboratory in California, says that he believes the collapse of stars does not lead to black holes. Instead, the space time contained within the star becomes filled with dark energy, which causes intruiging gravitational effects.
"If the dark-energy star is big enough, Chapline predicts, any electrons bounced out will have been converted to positrons, which then annihilate other electrons in a burst of high-energy radiation. Chapline says that this could explain the radiation observed from the centre of our galaxy, previously interpreted as the signature of a huge black hole."