  Black holes are more than just odd-looking curiosities in gravity theory.
They uniquely intertwine the basic principles of General Relativity with those
of Quantum Theory. Just by demanding that they nevertheless obey acceptable
laws of dynamics, just like stars and planets, we hit upon strange structures
that must play key roles in the quantum effects that we expect in the
gravitational force at ultrashort distance scales. It is explained why, in our
approach to address the problem of information conservation, the usual
expression for the temperature of Hawking's radiation is off by a factor 2.
