Keeton, C. R., and A. O. Petters. Formalism for testing theories of gravity using lensing by compact objects. III. Braneworld gravity. Physical Review D 73:104032 (May 24)Tiny Black Holes May Pervade Space
Most people think of black holes as supermassive objects, the remnants of collapsed stars whose powerful gravity devours all nearby matter. But some theories suggest that these strange objects may be much more common—and much closer to home—than had been thought. The solar system, for example, may contain 3,000 to 300,000 of these objects at a given time, some of them floating inside the orbit of Mars. New work suggests that such objects would produce interference fringes in the energy spectra of gamma-ray bursts, a prediction that soon should be able to be tested.
Source: American Scientist