ÜDS-Fen 2003-1 Soru=57

It is pointed out in the passage that those physicists who have tried to combine the theories of matter and relativity —.

To understand topics such as the origin of the
universe, the ultimate fate of black holes and the
possibility of time travel, we need to understand how
the universe works. We now have a good idea about
what the basic building blocks of matter might be.
Physics in the 20th century was built on the twin
revolutions of quantum mechanics (a theory of
matter) and Einstein's theory of space, time and
gravitation known as relativity. But it's extremely
unsatisfying to find two ultimate descriptions of
reality when you're looking for just one. Trying to
unify the two theories presents formidable technical
and conceptual obstacles that have challenged
some of the finest theoretical physicists for decades.