Could black holes be a factory for unusual material at their hearts?

Could black holes be a factory for unusual material at their hearts?
A white dwarf has been found lashing its red dwarf companion with a mysterious ray
The exoplanet HD 131399Ab is unlike any other known world
Decades of searching in the Milky Way’s nearby ‘twin’ galaxy Andromeda have finally paid off, with the discovery of an elusive breed of stellar corpse, a neutron star