A finding that may have interest. http://arxiv.org/PS_cache/arxiv/pdf/0901/0901.0510v1.pdf Quote. Some new challenges for an experiment and observation, which are consequences of the model of low-energy quantum gravity by the author, are considered here. In particular, the property of asymptotic freedom of this model leads to the unexpected consequence: if a black hole arises due to a collapse of a matter with some characteristic mass of particles, its full mass should be restricted from the bottom. For usual baryonic matter, this limit of mass is of the order 107M⊙.