Black holes described by the Schwarzshild and Kerr's metric due to the property of geodesic completeness have two types of lines-those going inside the horizon and those going outside.In ergosphere of the rotating black holes there are also lines characterised by negative energy originating inside the horizon.Collisions of particles moving on different geodesics can lead to the growth of energy in the centre of mass frame so that new high energy physics can be expected.The possibility of observations on Earth of the consequences of this new physics is to be discussed.

Page created on October 14, 2014.