Natural sciences have taught us a lot about the structure of matter and the evolution of the universe.
Despite tremendous progress in this fields, many puzzles are still to be solved
Structure of matter
As an example, we still know little about the properties of "hadronic matter",
i.e. matter that is composed of quarks and bound by the strong force -
one of the fundamental forces in nature. Thus our knowledge about protons
and neutrons, the constituents of the nucleus which make up more than 99.9
% of the visible mass of the universe, remains rather sketchy. 
more...
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Evolution of the universe
The evolution of the universe also confronts us with many open questions.
We know that tiny fractions of a second after the Big Bang all matter existed
as a primordial soup consisting of quarks, gluons, photons and leptons.
As the universe expanded and cooled down, a new phase of matter came into
being, composed of protons, neutrons and electrons - the building blocks
of our present world. more...
To answer these fascinating questions, GSI physicists together with scientists
from universities and research institutes, both in Germany and abroad, plan
for the new international accelerator center FAIR (Facility for Antiproton and Ion Research)
for intense, high-energy beams
of ions and antiprotons. A broad spectrum of scientific areas will be addressed
at the new facility.
Nuclear Structure Physics
 Physics
with Antiprotons
 Nuclear
Matter Physics
 Plasma
Physics
 Atomic
Physics
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